Abstract: An information handling system comprises a TCP/IP network connecting a hub to a multimedia server and the hub to a data server, and the hub to an IP telephony device that is then coupled to a network device. Data sent from the network device is addressed for transmission to the data server and is transmitted through the IP telephony device to the TCP/IP network. The present invention allows a user, such as a supervisor, to monitor the audio conversations of users on the system and current display information of another station. This can be done between remote systems so that the monitoring individual does not have to be in the same system as the user who is being monitored.

Abstract: The present invention is drawn to a call trace system and method that is simple to establish in a short amount of time. The call trace is implemented through a Web browser page which remotely programs central offices to trace calls to particular number. When a trace is established a message is sent back to the Web browser which displays the calling number, the called number and the central office detecting the call. Also, a page is sent to a pager which displays the traced information.

Abstract: A system and method for calling a toll-free or vanity number using speech recognition is provided. The system and method of the present invention allow a user to speak or spell the contents of a toll-free vanity number or personal vanity number. An automatic speech recognition system interprets the users speech to make an appropriate connection to the toll-free vanity number or personal vanity number.

Abstract: A system for developing, deploying and maintaining a voice application over a communications network to one or more recipients has a voice application server connected to a data network for storing and serving voice applications, a network communications server connected to the data network and to the communications network for routing the voice applications to their intended recipients, a computer station connected to the data network having control access to at least the voice application server, and a software application running on the computer station for creating applications and managing their states. The system is characterized in that a developer operating the software application from the computer station creates voice applications through object modeling and linking, stores them for deployment in the application server, and manages deployment and state of deployed applications including scheduled deployment and repeat deployments in terms of intended recipients.

Abstract: An apparatus for sharing bandwidth between voice and data includes an on demand dial up router for automatically connecting to an Internet Service Provider using an analog telephone line, first circuitry for multiplexing voice and data signals over the analog telephone line, and second circuitry for allocating bandwidth between the voice and data signals according to a predetermined criteria.

Abstract: There is disclosed a voice storage apparatus which carries out synchronization processing of voice and an external message based on a synchronization signal such as a time stamp and performs stop of recording unnecessary voice data and smooth change of reproduced voice in an environment using a network such as a LAN in which fluctuation in an arrival time of voice or data.

Abstract: A system for presenting a recorded message on behalf of an agent receiving a call at an agent station in a call center, the agent station having a telephony interface for receiving calls and a personal computer with a video display unit (PC/VDU), has a telephony switching apparatus enhanced by a computer-telephony integration (CTI) processor, an Interactive Voice Response (IVR) system executing a voice treatment option (VTO) software, coupled to the telephony switching apparatus and the CTI processor; and a data repository having recorded messages stored on behalf of the agent and accessible to the CTI processor. The CTI processor routes incoming calls to the telephony interface for the agent, uses data associated with the calls for selecting appropriate recorded messages, and causes, by controlling the IVR, a retrieved recorded message to be played to a caller upon the agent picking up the routed call.

Abstract: A method for managing call information has steps of receiving a plurality of calls, determining the caller for each call, and recording a message for at least one of the calls with a recorder. A call record is created for each call, with the record having at least caller information and an indication of whether a recorded message is associated with the call. The records are displayed on a display, which has a selector for selecting one of the records. The method further comprises a step of replaying the recorded message associated with a selected record.

Abstract: One embodiment of the invention includes an apparatus for providing electric power to a telephone across a transmission line where the telephone is coupled to a network device. A power and data coupler (“the coupler”) is coupled to one end of the transmission line. The transmission line is also adapted for transmission of a data signal. The data signal includes telephone signal data for communications with the telephone. The coupler has a data input and a power input. Power from the power input is coupled to the data signal from the data input and the combined power supply current and data signal is coupled to one end of the transmission line. The opposite end of the transmission line is coupled to a power and data decoupler (“the decoupler”). The decoupler has a power output and a data output. Both the data output and power output of the decoupler are coupled to the network device.

Abstract: The balance or a portion of the balance associated with a prepaid card with or without a microcircuit is paid into a balance portion collection server, as a donations to charities, after setting up a call between a terminal and the server and after confirmation of the payment by the user at the terminal to increment a counter with the balance or balance portion. In another embodiment, balance portions are paid cyclically into the server or into a connection unit as and when a telephone call runs.

Abstract: A method and system for customizing caller ID information can be used in a call center or other telephony system to present customized caller ID information to a called party independent of the telephone line from which the call is made in the call center. The system retrieves at least one call record including a telephone number to be called and a customized caller ID telephone number associated with the call record. The number to be called and customized caller ID number are placed in a setup message formatted using an Integrated Services Digital Network (ISDN) protocol. The setup message is sent to the Public Switched Telephone Network (PSTN) to establish a telephonic connection with the called party. If the called party subscribes to the caller ID service, the customized caller ID telephone number and any associated information will be presented to the called party.

Abstract: A call routing function may receive information from a user profile about how to handle a telephone call. In addition, the call routing function may also receive information about what the user is currently involved in doing. This information may be derived from the user's software-based calendar. Using both sources of information, a call may automatically be appropriately routed by the call routing function.

Abstract: A subscriber unit in a telephone network may receive personalized services from a network by providing personalized software to the network. The subscriber unit may prepare or have prepared particular personal agent software that implements certain enhanced functions designed by or for the subscriber. That software may then be uploaded to the network. Upon the occurrence of a certain event, the personal agent software is executed by the network to provide the personalized service desired by the subscriber. In some cases, the network may afford a variety of primitives which may implement basic functions that may be called by the personal agent software.

Abstract: There is disclosed a telephone voice control system capable of reducing the load on an application program in CTI technology to enable loading of the application program. This system is furnished with an intermediate processing unit (middleware) and an application program. The intermediate processing unit is provided with a call processing part 104, a voice data processing part 106, a status management part 105 for maintaining the status of the call processing part and the voice data processing part, and a control part 103 for controlling the call processing part and the voice data processing part. The application program sends a request to the intermediate processing unit. In operation, the control part compares a state enough to execute the request from the application program with the status maintained by the status management part, and if both disaccord, requests the call processing part and the voice processing part to perform processing for matching both states with each other.

Abstract: Telephone users desiring directory assistance services are connected via standard telephone procedures to a directory assistance provider, such as an operator. An operator provides the destination number and initiates a connection to that number. Once that connection is initiated, the connection is monitored for the occurrence of a predetermined condition, such as a busy signal. If no such condition is detected, the caller proceeds with the call in the normal manner. If, however, such a condition is detected, the caller is automatically transferred to a directory assistance provider for further help. In addition, a pool of operators/agents capable of receiving the request for concierge-like services generate an electronic ticket representing such request. A pool of fulfillment agents capable of receiving the electronic ticket engage in such action as necessary to fulfill the request.

Abstract: Improved systems and methods for call and call feature setup, administration and processing on PSTN and other telecommunications networks are provided. Calls are set up on a service plane of a conceptual switch that includes a switch plane, control plane, and service plane that are analogous to the OSI layered model of networks including a physical layer, network layer and application layer. Call set-up logic is separated from the switching fabric, allowing for flexible, on-demand, modification of service options using software while maintaining the same switching fabric in hardware. Call set-up is accomplished by a call request made upon connection of a call to the switch. This causes a call agent to search an eXtensible Markup Language knowledge base to find a web page corresponding to the initiating caller. The Web page may be collocated with the switch or on a LAN with the switch or on the “Web,” even on the caller's termination equipment (telephone).

Abstract: Network resources for a call between a calling party and a called party are allocated. The network resources for the call are reserved based on a reservation request. The network resources are reserved before any one network resource from the reserved network resources is committed. The reserved network resources for the call are committed when a called party indicates acceptance for the call.

Abstract: A system and method for electronically exchanging information related to telecommunication services includes separating data representing the information to be exchanged into predefined segments corresponding to telecommunication services, associating a segment identification code with each segment, and grouping each segment identification code with corresponding data. The system and method also include concatenating the segment identification codes and associated data according to a predefined sequence to form an electronic transaction and transmitting the electronic message to a telecommunications wholesaler or reseller. Preferably, the information is exchanged over a TCP/IP connection in an interactive, transaction-based exchange.

Abstract: The invention relates to the operation and administration of a call center, the network elements of which or the applications of which are distributed in a network and, in particular, are available via the Internet. In this arrangement, switches of a public network are linked into the administration. Communication between different network elements, particularly applications and servers from different domains takes place by converting interfaces of the applications into a protocol which is intended for interdomain communication.

Abstract: A communication assistance system (2) is provided for accessing information corresponding to a plurality of subscribers (6). This system is comprised of a telephone switch (12) for receiving calls from a plurality of requesters (4), a call center (16) for routing each of said received calls to an operator terminal (20), and a first database (18) configured to store said information corresponding to each of said subscribers (6).

Abstract: This invention relates to novel approach to existing telecommunication services, particularly, instead of dialing telephone numbers, subscribers are now accessed through dialing subscribers' names; more particularly, calling name of subscriber and identifying other subscribers' personal data, perhaps called party address, unattended active telephone directory database of this novel system generates and queries the dynamic subscribers' telephone number issued while processing the static subscriber's telephone number accessed from public telephone network directory information database in relation to identified, localized, and real-time authenticated subscriber's data; next, dialing this dynamic number to connect parties; even more particularly, this invention describes system and method for providing telecommunication services in a worldwide global telecommunication network including wireline and wireless networks to a subscriber with at least one telecommunication unit, which the subscriber can be accessed dy

Abstract: Telephone users desiring concierge-type services may connect via standard telephone procedures to a directory assistance provider, such as an operator or voice server. For example, the users may communicate to the provider a concierge-type service request for making a restaurant reservation. The provider may process the request in real time through an on-line reservation system (ORS) or off-line, in accordance with the invention. In processing the request off-line, a pool of fulfillment agents may engage in such action as necessary to fulfill the request. The agents are networked to directory assistance and concierge databases and to third-party providers of concierge services to facilitate the process.

Abstract: A method for handling a customer contact request over a communication network includes selecting a subset of the agents at random within a set of agents who are able to handle the request. Relative levels of workload are determined among the agents in the subset, and one of the agents in the subset to whom to assign the request is chosen so as to balance the relative levels of workload within the subset.

Abstract: A main distribution frame (MDF) is provided for providing the user with ADSL services by simply making a slight modification to a conventional main distribution frame and performing an extremely simple wiring operation. An inlet splitting plane (ISP) and a high pass filter splitting plane are also provided which can be suitably used in the main distribution frame. The main distribution frame has an outlet splitting plane, the inlet splitting plane having a low pass filter, and a high pass filter splitting plane having a high pass filter. The outlet splitting plane is connected to supply its output to the inlet splitting plane and high pass filter splitting plane in parallel. The inlet splitting plane is connected to a telephone exchanger system, while the high pass filter splitting plane is connected to an ADSL system.

Abstract: A push-button signal receiving device and a gain control method whereby error in validity determination of a received signal that accompanies the insertion of an AGC circuit can be prevented. An input bush-button signal is amplified by amplifying circuit and separated into signals of low- and high-frequency bands by first and second band-pass filters, respectively. Dialed number identifying circuit detects the frequencies of the separated signals to identify the dialed number, determines validity of the received push-button signal, and outputs the identified dialed number in accordance with the result of validity determination. Level detecting circuit detects the level of the output signal from the amplifying circuit. Gain control circuit controls the amplification gain of the amplifying circuit in accordance with the detected signal level, and holds the value of the amplification gain of the amplifying circuit while the received push-button signal is judged valid by the dialed number identifying circuit.

Abstract: A control device (4) for connection of a telephone set (2) to at least one speaker (41) for reception of an audio signal and/or of at least one microphone (46) for transmission of an audio signal, comprising a digital signal processor (DSP) (10), an analog-to-digital converter (ADC) (11) to convert the digital signal coming from the telephone set (2) and/or from the microphone (46) to a digital signal that can be processed by the DSP (10), and a digital-to-analog converter (12) to convert the digital signal coming from the DSP (10) to an analog signal to be sent to the telephone set (2) and/or to the speaker (41), the control device (4) performing different functions, such as recognition of the voice conductors, storage and transmission of messages, equalization of the signal received and suppression of ambient noise.

Abstract: Systems and methods are described for a download booster for ADSL transmission. A method includes extending a digital subscriber loop including: coupling a telephone company central office to a customer premises via the digital subscriber loop; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises. A method, includes: providing a digital subscriber loop service to a customer premises that is coupled to a telephone central office via a digital subscriber loop line; filtering a downstream digital subscriber loop signal at the customer premises; and amplifying the downstream digital subscriber loop signal at the customer premises.

Abstract: A double-talk detector (109) for an acoustic echo canceler (104) of a VoIP terminal (101) converts (216,226) received far-end signals (212) and transmitted near-end signals (222) into the frequency domain and high-pass filters out (218,228) low-frequencies representing noise to obtain a complex reference signal and a complex error signal, respectively. It then correlates (230) the complex signals and computes (232) the instantaneous error energy (234) and smoothed (long-term average) error energy (235) of the complex error signal. If the convergence value is below 0.06 (300), the signals are converged and double-talk detection is enabled (306). If the convergence value is above 0.09 (312), the signals are diverged and double-talk detection is disabled (316). If double-talk detection is not enabled, an error threshold (236) is set (304,318) to the value of the smoothed error energy.

Abstract: A hang device for a mobile phone comprises a hanging base, a spool, an elastic clip, and an outer cover. The hanging base provides a spool chamber for receiving the spool and the spool chamber at a center thereof extending outward a hanging spindle. The hanging spindle at an end thereof is attached with a spring to urge a projection piece and the projection piece at an end thereof extends a projection stop. The hanging base at the back thereof provides a back groove, and a thread hole is disposed near the spool chamber. The pool provides two opposite flanges with a pulled thread wound around a center between the flanges. A torsional spring is mounted in the spool with an end thereof being fixedly attached to the hanging spindle. One of the flanges provides a flange ring against the projection stop. The elastic clip is made of a bent sheet material and has a facial side thereof be joined to the hanging base and the other one of the facial sides be joined to the outer cover.

Abstract: The present invention relates to a cryptosystem. A keystream table [Ks] is a virtual data space. Every data of 1 byte in a secondary ciphertext E2 provides a vector directional component IR. The data Ks (IR) in the keystream table [Ks] designated by the directional component IR of the vector is recognized as the quantitative component of the vector. By handling a secondary ciphertext E2 of 1 byte as the address in the keystream table [Ks], the secondary ciphertext E2 can be recognized as the directional component of the vector. A logical operation for the data Ks (IR) is performed, and the internal vector data V is sequentially replaced every 1 byte. An exclusive OR operation is performed between the internal vector data V and the primary ciphertext E1 for generating a secondary ciphertext E2.

Abstract: A digital signal processing apparatus and method for executing a block cipher routine. A method includes configuring a portion of an array of independently reconfigurable processing elements for performing the block cipher routine. The method further includes executing the block cipher routine on data blocks received at the configured portion of the array of processing elements. The non-configured portion of the array can be shut down to conserve power. An apparatus includes a context memory for storing one or more context instructions for performing the block cipher routine. The apparatus further includes an array of independently reconfigurable processing elements, each of which is responsive to a context instruction for being configured to execute a portion of the block cipher routine.

Abstract: Encryption of documents is used to restrict access to such documents to those users who have the appropriate decryption keys. The encryption of documents on public web servers hitherto has prevented indexing by search engines. By keeping words and possible sentences or paragraphs intact in the encrypted document but re-ordering elements of the document to prevent the document being human-readable, the possibility of encrypted documents being indexed by search engines is provided.

Abstract: The low-interference communications device uses chaotic signals which are almost periodic. A chaotic circuit driven by a sine wave signal from a function generator is produced which has narrow-band features in the power spectrum. An information signal is encoded on the chaotic signal by modulating the phase of the sine wave that drives the chaotic circuit. Periodic (narrow-band) components are then removed from the chaotic signal and the chaotic signal is transmitted to a receiver device. The chaotic signal is nonlinear, so the narrow band and broad band parts of the chaotic signal have been modulated together. The transmitted signal is relatively flat, so it will not interfere with other communications signals. At the receiver, the nonlinear chaotic signal is restored by performing a nonlinear operation on the received signal, such as squaring or cubing, to remove the narrowband components. Then the information modulated onto the narrow band component is detected.

Abstract: A method for encryption and decryption of data items is provided by defining a cipher key based on variables in a Chaotic Equation. The method includes selecting a Chaotic Equation (110) from a set of Chaotic Equations, defining starting conditions of the variables of the equation (140), and applying the equation to each data item (120). The real and imaginary parts of the result of the iteration of the Chaotic Equation are combined with the data item by an arithmetic operation, for example, an XOR operation (120). Data items in a continuous stream with a rate dependency can be encrypted and decrypted on an item by item basis. The input or cipher key changes for each byte of the data encryption. Blocks of data (700, 701, 702, 703, 704) can be encrypted using the method with an identifier of the order of the blocks in the data stream. If blocks are received out of sequence, the identifiers can be used to maintain the correct decryption order.

Abstract: Disclosed is a system composed of a main device and a recording medium device. The main device includes: a reception unit that receives a digital work from an external distribution server; an internal storage area for storing the digital work; a playback unit that plays back the digital work; a unique information storage area for storing information that is unique to the main device; an encryption unit that encrypts the digital work using the unique information; a decryption unit that decrypts, using the unique information, the encrypted digital work having been read from the recording medium device; a write unit that writes the encrypted digital work into the recording medium device which is portable; and a read unit that reads the encrypted digital work from the recording medium device.

Abstract: A wireless data communication device for performing a short-distance wireless data communication. The device comprises an infrared communication section, a CPU, a memory, an encryption/decryption unit, and a wireless communication section. The infrared communication section exchanges shared key data with a station that is another party of wireless data communication. The key data is required in identifying the station and encrypting data to be transmitted to the station. The CPU stores the shared key data into the memory. The key data is read from the memory. Using the key data, the encryption/decryption unit encrypts and decrypts data. The wireless communication section receives the data encrypted by the encryption/decryption unit and transmits it to external apparatuses.

Abstract: A wireless communications system includes a first station in wireless communications with a second station along at least one channel. The first station initiates a local suspend function for the channel, with a suspend point determined by a first sequence number (SN). Prior to a resume command to terminate the local suspend function, a reset procedure for the channel is performed. In response to the reset procedure, the first SN of the suspend point is set equal to a default value. This halts communications along the channel while the channel is locally suspended. The resume command for the channel then terminates the local suspend function. Alternatively, the suspend point is determined by a first hyper-frame number/sequence number (HFN/SN) pair.

Abstract: An apparatus for installing a decryption key is initially arranged so that a decryption algorithm received by a control processor is passed via a first interface path to a decryption processor. The algorithm is installed in the decryption processor together with a program decryption key. The apparatus is subsequently arranged so that encrypted working decryption keys received by the control processor are passed on to the decryption processor over the first interface path. The decryption processor decrypts the encrypted keys using the program decryption key. Decryption keys are thus obtained and are transferred via a second interface path to decryptors for use in decrypting encrypted program signals input to the decryptors.

Abstract: Methods and apparatus for providing cryptographic keys for cryptographically processing information are provided. Means are provided for receiving a first cryptographic signal. Means responsive to said first cryptographic signal are provided for generating the cryptographic key. The cryptographic key has an associated first work factor for a person without knowledge of said first cryptographic signal. The cryptographic key also has an associated second work factor which is smaller than the first work factor for a person with knowledge of the first cryptographic signal. Thus, the work factor of the key can be reduced to a level which is small enough to satisfy governmental export or import requirements without reducing the protection level or strength of the system. A single cryptographic key generator (engine) can be easily adapted for use in different countries, where different work factors are required.

Abstract: A virtual network connectable to a data communications network for allowing a sender to send an encrypted message to at least one recipient from any data terminal connected to the data communications network. The virtual network comprises a respective user space dedicated to the sender and each recipient for storing a respective public and a respective private key thereof, and at least one computer coupled to each user space for controlling access thereto so as to allow the sender and each recipient unrestricted access to his own user space for accessing his own public and private keys while allowing access to the public key only in any other user space.

Abstract: A method and apparatus for consumption of content (1) is described in which a licensor is able to exercise control over consumption based on a personal identity in the form of a set of binding attributes (15). The control may be exercised for a number of consuming terminals (19) including rendering machines such as portable video and audio players.

Abstract: A hearing aid with a test controller for detection of a defect in the signal path of the hearing aid is provided. The test controller controls a test signal generator and a probe means for determination of a signal parameter, such as signal level, frequency spectrum, phase characteristic, auto-correlation, cross-correlation, etc. A set of signal switches controlled by the test controller is provided for connecting a desired test signal generator or a desired probe means to a desired point in the signal path for testing of a desired part of the hearing aid. Further signal switches are provided for coupling hearing aid components into and out of the signal path of the hearing aid.

Abstract: A sound processing apparatus for creating virtual sound sources in a three dimensional space includes a number of modules. These include an aural exciter module; an automated panning module; a distance control module; a delay module; an occlusion and air absorption module; a Doppler module for pitch shifting; a location processor module; and an output.

Abstract: An interface device for interconnecting fixed controls of a vehicle to electronic devices. The interface device is capable of receiving control signals from fixed controls, such as steering wheel controls, backseat controls, handlebar controls, and the like, and then transmitting corresponding control signals to the electronic devices. In one aspect, the device is programmable such that the interface device emits signals corresponding to the same signals that would be emitted from a handheld remote control sold in conjunction with the different electronic devices. In one embodiment, the device is an interface between the fixed controls and a replacement stereo receiver. In another embodiment, the device is capable of recognizing spoken voice commands and generating corresponding IR signals in order to control the electronic devices. In still another embodiment, the device is an interface between the fixed controls and multiple electronic devices, such as an audio and video component.

Abstract: This present invention is related to a capacitor microphone. Capacitance change of a microphone unit without polarization voltage is converted to a digital signal to obtain a sound signal in order that the microphone restricts noise and the productivity of the microphone is increased. The capacitor microphone comprises a first oscillator 2 which outputs a sound signal varying frequency in response to capacitance change of the microphone unit 1, a second oscillator 3 which outputs a tracking signal varying frequency because of a control voltage CV, a phase comparator 4 comparing phases of the sound signal and the tracking signal to output lead or lag signal, and an adder-subtracter 14 outputting digital sound data. An adding-pulse signal and a subtracting-pulse signal, which are obtained by the logical product of the lead-phase or lag-phase signal and clock pulses, are inputted to the adder-subtracter 14.

Abstract: A piezoelectric electroacoustic transducer that is capable of preventing a short-circuit between an internal electrode and external electrode and also capable of preventing cracks of ceramic layers during polarization to improve a yielding rate. A piezoelectric electroacoustic transducer, including a plurality of piezoelectric layers deposited to define a deposited product, flexually vibrates the deposited product by polarizing the entire piezoelectric ceramic layers in the same thickness direction and also by applying an alternating signal between external electrodes disposed on the front/rear major surfaces of the deposited product and an internal electrode disposed between the ceramic layers. A dummy electrode is provided between the ceramic layers outside the internal electrode via a gap, and a portion of the internal electrode is exposed at at least one side surface of the piezoelectric ceramic layers, while the dummy electrode is exposed at the other side surface of the piezoelectric ceramic layers.

Abstract: A mixing console has, for example, eight signal processing channels each for processing audio signals, and indicator units respectively for the signal processing channels. Each indicator unit is to display the channel number or the note name or another short message about the channel. Each channel is provided with a control element for commanding a control such as setting equalizer parameters. When a control element is actuated and held for more than one second, for example, such an actuation causes the designation of a channel about which a long message is displayed by using the indicator units for the eight channels in series.

Abstract: Active acoustic device comprises a panel member (11) having distribution of resonant modes of bending wave action determining acoustic performance in conjunction with transducer means (31-34). The transducer means (31-34) is coupled to the panel member (11) at a marginal position. The arrangement is such as to result in acoustically acceptable action dependent on said distribution of active said resonant modes. Methods of selecting the transducer location, or improvement by location of localised marginal clamping, rely on assessing best or better operative interaction of said transducer means (31-34) and the panel members (11) according to parameters of acoustic output for the device as an acoustic radiator.

Abstract: Acoustic device comprising a member relying on bending wave action with beneficial distribution of resonant modes thereof, wherein the member has its acoustically active area at least partly bounded by means having a substantially restraining nature in relation to bending wave vibration. Operation can be below coincidence, or above if desired for active acoustic device further having beneficial location of bending wave transducer means determined with reference to and taking account of such bounding means.

Abstract: The present invention relates to an electret condenser microphone including the vibratory diaphragm which is comprised of an electret film into which an electric charge is charged; a conductive film formed on one side of the electret film by sputtering or chemical vapor deposition (CVD); and a polar ring disposed at a peripheral edge of the underside of the conductive film such that the conductive film formed on the electret film is located apart from the inner surface of the case at a given distance (&Dgr;t). Also, this microphone includes a vibratory diaphragm support member which is disposed on the vibratory diaphragm and has a concave groove and a concave portion. The concave portion has a plurality of sound holes which are formed at a bottom surface thereof such that the vibratory diaphragm is vibrated easily. On the vibratory diaphragm support member is attached an integrated circuit serving to receive and amplify a transformed electrical signal from the vibratory diaphragm.