Abstract: An oscillation device (100) includes a piezoelectric element (121), a vibrating member (122) which binds one surface of the piezoelectric element (121) and is formed of a metal material, a resin member (123) which holds an outer circumferential portion of the vibrating member (122), a piezoelectric element (111), a vibrating member (122) which binds one surface of the piezoelectric element (111), is overlapped with the vibrating member (121) and the resin member (123) when seen in a plan view, and is formed of a metal material, and a support member (140) which supports the resin member (123) and the vibrating member (112), wherein at least one opening (150), which connects a space (170) positioned between the vibrating member (121) and the resin member (123), and the vibrating member (122) to the outside of the space (170), is provided in at least one of the vibrating member (121), the resin member (123), and the vibrating member (112).

Abstract: An electronic apparatus includes a substrate and an oscillation device (100) which is supported over the substrate, wherein the oscillation device (100) includes a piezoelectric element (110), a vibrating member (120) which binds one surface of the piezoelectric element (110), and a tubular support member (140) which supports an outer edge portion of the vibrating member (120) in an inner surface and is joined to the substrate so that an opening of one end side is closed by the substrate, and the support member (140) includes at least one hole (141) which connects a space, which is surrounded by the substrate and the vibrating member (120) in an inner portion of the support member (140), to an outer portion of the support member (140).

Abstract: A mobile phone (100) detects at least a direction of an utterance position of a user from the voice input to a plurality of microphones (121,122) and controls an output direction of a voice out of a speaker unit (110) to match the detected utterance position. Accordingly, it is possible to provide sound with sufficient volume only for a specific user without causing noise in the neighborhood. The microphones may form a matrix together with piezoelectric vibrators that form a speaker unit, or may be formed separately from the speaker unit.

Abstract: An elastic vibration plate (110) is divided into a plurality of elastic vibrating regions (112) through slits (111) having a predetermined shape, a plurality of piezoelectric vibrators (120) which are individually mounted on at least some of the plurality of elastic vibrating regions (112) on the elastic vibration plate (110) undergo elastic vibration due to application of an electric field. Therefore, it is possible to vibrate the plurality of elastic vibrating regions (112) on a single elastic vibration plate (110) using the plurality of piezoelectric vibrators (120). Therefore, it is possible to adjust the peak value and the like of the oscillation frequency at will in each of the plurality of elastic vibrating regions.

Abstract: An oscillation device includes: a piezoelectric vibrator (110) in which electrode layers (112, 113) are formed over top and bottom surfaces of a piezoelectric layer (111); a vibrating member (120) having at least atop surface to which the piezoelectric vibrator (110) is bonded; and a resin member (130) formed continuously in a circumferential direction over at least the outer side surface of the piezoelectric vibrator (110). Therefore, since it is possible to increase the working area of the piezoelectric vibrator, it is possible to realize both an increase in the sound pressure level of the output and miniaturization of the apparatus.

Abstract: A portable terminal device has first and second casings (1, 2) and a biaxial hinge (3) coupling the first and second casings (1, 2). The portable terminal device also has a speaker (60) provided in the first casing (1) or the biaxial hinge (3), a sound emission hole (4), a waveguide (5) guiding a sound wave to the sound emission hole (4), and a display device (6) provided for the second casing (2). A display screen (6a) of the display device (6) and the sound emission hole (4) are disposed in a face (2a) whose orientation changes when the second casing (2) turns about a second axis, in the second casing (2).

Abstract: In an oscillator (100), a plurality of piezoelectric vibrators (111 to 113) supported by vibrator support mechanisms (120) individually output highly directional sound waves. The plurality of piezoelectric vibrators (111 to 113) is formed by dividing a laminated body of an elastic member and a piezoelectric substance by the vibrator support mechanisms (120). Since it is not necessary to arrange the plurality of piezoelectric vibrators in a matrix, the entirety of a device can be small-sized. A sound deflection unit that deflects a sound wave which is output by at least one of the piezoelectric vibrators may be further included.

Abstract: A second piezoelectric vibrator (30) is located in a hollow portion (21) of the first piezoelectric vibrator (20) when seen in a plan view. A support (40) is a frame-shaped member, and the inside surface thereof supports the edge of a vibration member (10). The fundamental resonance frequency of the first piezoelectric vibrator (20) is lower than the fundamental resonance frequency of the second piezoelectric vibrator (30). In addition, the second piezoelectric vibrator (30) overlaps a loop of vibration generated in the vibration member (10) when the first piezoelectric vibrator (20) is driven at the fundamental resonance frequency. Preferably, the center of the second piezoelectric vibrator (30) overlaps the center of a loop of vibration generated in the vibration member (10) by the first piezoelectric vibrator (20).

Abstract: An oscillator includes a piezoelectric vibrator (10), a vibrating member (20) which is larger than the piezoelectric vibrator (10) when seen in a plan view and restrains one surface of the piezoelectric vibrator (10), a vibrating member (25) which is larger than the piezoelectric vibrator (10) when seen in a plan view and restrains the other surface of the piezoelectric vibrator (10), an elastic member (30) which supports an edge of the surface of the vibrating member (20), which restrains the piezoelectric vibrator (10), and supports an edge of the surface of the vibrating member (25), which restrains the piezoelectric vibrator (10), and a supporting member (35) which is located around the elastic member (30) and supports the elastic member (30).

Abstract: There are provided a vibration film (21) having a piezoelectric element, a magnetic circuit (20) which generates magnetic force on the basis of a first electric signal and vibrates the vibration film (21) by the magnetic force; and an adjustment unit (31) which generates a second electric signal on the basis of the first electric signal and applies a voltage based on the second electric signal between both surfaces of the piezoelectric element. The amplitude of the entire vibration film (21) is expanded by making the vibration by the magnetic force, which is generated from the magnetic circuit (20), and the vibration, which is generated by application of a voltage to the piezoelectric element, synchronize with each other.

Abstract: An automobile radio telephone apparatus capable of detecting a drop of power source voltage to prevent a telephone channel from being occupied wastefully and to thereby enhance efficient use of channels with regard to the operation of an automobile radio telephone system. When the power source voltage is lower than a predetermined voltage, the apparatus informs the user of such an occurrence. On the lapse of a predetermined period of time and if a conversation is under way, the apparatus warns the user that it will execute a forcible conversation ending procedure and then executes it.

Abstract: In a portable telephone apparatus selectively operable in a portable mode or in an on-board mode, an option circuit is built in a chargeable battery pack for adding an extra function to a telephone. A plurality of keys are arranged on the telephone and operable to cause the telephone and option circuit to interchange speech signals and control signals and to start and stop operating.

Abstract: In a mobile telephone device, the audio compressor (21) performs amplitude compression by giving a less variable gain to an input audio signal which is of a lower level range than it does for an input audio signal which is of a higher level range. Alternatively, an adder (17) calculates a sum of (a) an audio signal comprising a talk signal component and a noise component, and (b) a generated signal having an out-of audio frequency, as 6 kHz, and a predetermined level and supplies the compressor (21) with the sum as its input signal. A compressed signal is transmitted to a base station as a radio signal and is expanded.

Abstract: An electronic clock includes a usual oscillator and a more accurate oscillator. The usual oscillator generates a first frequency which causes the electronic clock to operate and the more accurate oscillator generates a second frequency which is used as a reference frequency. Referring to the second frequency, the first frequency is measured by a frequency measurement circuit and a deviation of the first frequency from a design frequency is calculated by a processor. According to the deviation, time correction of the electronic clock is performed. Therefore, even if an actual oscillation frequency of the usual oscillator is not stable precisely, the accurate time correction can be achieved.

Abstract: The telephone mouthpiece of the present invention comprises a microphone unit 3, a unit housing section 1 and an acoustic duct section 2 tightly fitted to the unit housing section 1. The unit housing section 1 comprises a flat plate 11 and a cylindrical housing 12 housing the microphone unit 3 provided on the flat plate 11. The acoustic duct section 2 comprises: an acoustic duct box 21 in the form of a box in close contact with the corresponding flat plate 11; and a cylindrical box 22 in close contact with the cylindrical box 12 at an end of the acoustic duct box 21; partitions 23 and 24 for partitioning inside of the acoustic duct box 21 into a plurality of air chambers; and slits 29 and 30 provided on the partitions 23 and 24.

Abstract: A self-diagnosing method that shortens the diagnosing time for a ROM, which is provided within a mobile telephone set for use in a mobile telephone switching system, and the method being applied to a mobile telephone set. When the power supply is turned ON, data which is stored within a specific address of the ROM (ROMCHK), having a complementary value which complements the sum of data stored within all the addresses of the ROM to provide a certain specific value, is compared with data which was previously stored within a specific address of the non-volatile memory (NVMCHK), having the same value as the ROMCHK. If the contents of the two data do not coincide, then the content of the data within the entire area of the ROM is calculated for the diagnosis. In this case, the content stored within the specific address of the ROM is the sum of the data values within the entire area of the ROM, and the content stored within the specific address of the non-volatile memory is the same as this sum value.

Abstract: In a mobile telephone device, an adder (17) calculates a sum of (a) an audio signal comprising a talk signal component and a noise component and (b) a generated signal having an out-of audio frequency, as 6 kHz, and a predetermined level and supplies a compressor (21) with the sum as its input signal. The adder and the compressor give a less variable gain to the audio signal of a lower level range than to that of a higher level range. Alternatively, the compressor alone gives the less variable gain to the input signal of the lower level range. A compressed signal is transmitted to a base station as a radio signal and is expanded. For use in a radio communication system of the type in which the generated signal can be given either by the supervisory audible tone or by the reference tone.

Abstract: A switching type echo canceler includes speech sample storing RAMs on a line side and on a handsfree device side, tap coefficient storing RAMs on the line side and on the handsfree device side, a pseudo echo generation unit, a tap coefficient updating unit, a level comparison unit for comparing input signals on the line side and on the handsfree device side, and a plurality of switches for switching between the line- and hands-free-device-side echo cancel operations in accordance with a switching signal from the level comparison unit.

Abstract: Speech signals appearing at the receiving and transmitting paths of a speakerphone which operates under voice switching, are received at a control circuit. The control circuit issues a control signal which assumes a first level in the event that a signal at the receiving path exceeds a signal at the transmitting path and which assumes a second level if the signal at the receiving path falls below the signal at the transmitting path. Communication loss is inserted in both the receiving and transmitting paths in response to the first level of the control signal, and is eliminated therefrom in response to the second level of the control signal.

Abstract: In a mobile communication terminal device, a serial number for use in charging control of a subscriber and so on is prevented from being incorrectly rewritten and hence the subscriber is prevented from being incorrectly charged. An electrically writable/ersable memory 10 in the mobile communication terminal device includes a first storage region RG1 for storing information as an encoded serial number and a storage region RG2 for storing said serial number before encoding, and further a CPU 2 includes means for decoding said encoded information and comparing it with said unencoded serial number, and disabling the mobile communication terminal upon incoincidence of the decoded information and the unencoded information.