Abstract: A microphone includes a tubular handgrip extending in a longitudinal direction, confining an accommodating space, and having a surrounding wall formed with an opening for access into the accommodating space. A battery-mounting seat is mounted in the accommodating space, and is formed with a battery-receiving groove that extends in the longitudinal direction and that has an open side facing the opening in the surrounding wall of the handgrip. A cover plate is connected pivotally to the battery-mounting seat, and is disposed adjacent to the open side of the battery-receiving groove. A sleeve is sleeved detachably on the surrounding wall of the handgrip for covering the opening in the surrounding wall.

Abstract: The present invention provides a low noise phantom powered capacitor microphone and a method of using a vacuum tube as an impedance converter of the microphone capsule in the capacitor microphone with no exclusive power supply.

Abstract: An intermediate connector (14) is provided between a microphone unit (2) and a cylindrical housing (4). The connector (14) electrically connects the grounding part of the microphone unit (2) and the cylindrical housing (4) substantially by the shortest path while blocking mechanical vibrations. As a result, undesired high-frequency noises attributed to surrounding strong electric field are removed.

Abstract: A microphone comprises a housing defining an inner volume and including a first exterior surface with an aperture leading to the inner volume. The microphone includes a transducing assembly within the housing for converting sound into an electrical signal. A sound inlet plate defines, typically in combination with the first exterior surface, a passageway for transmitting sound to the aperture The passageway receives the sound from an opening in the sound inlet plate. The opening is offset from the location at which the aperture is positioned on the exterior surface. The sound inlet plate is made very thin so that it does not extend substantially away from the housing.

Abstract: The pressure-difference microphone is arranged in a housing, and there is provided in one of the housing walls a single opening, directed onto the front side of the microphone, for feeding voice commands which can be produced in the acoustic near field of the housing. According to the invention, the arrangement of the microphone and/or the air volume which surrounds the microphone in this case are such that the microphone can be irradiated with sound through the opening, using the pressure-difference principle.

Abstract: A microphone for converting sound into an electrical signal includes a generally cylindrical housing including an inlet for receiving sound, an inner backplate, and an outer backplate. The inner and outer backplates are generally cylindrical and substantially concentric with each other. A cylindrical membrane is disposed between the inner and outer backplates. The membrane divides an interior of said housing into a front volume and a back volume. The front volume is in direct communication with the inlet. The backplates and/or membrane are charged. Electronics are included for detecting movement of the membrane relative to the inner and outer backplates in response to the membrane moving when subjected to the sound. The backplates and membrane may be of a shape that approximates a cylinder, such as those that have a hexagonal or octagonal cross-section.

Abstract: An acoustic mechanism is provided for a microphone, by which the transmission sensitivity-vs.-frequency characteristic of the microphone can be adjusted by an easy operation. Good communication quality can be thereby invariably secured for radio communications, and a preferred communication sound can also be obtained.

Abstract: A directional microphone includes a yoke, and a magnet and a washer disposed in the yoke. An annular cap body encloses a surrounding wall portion of the yoke, and has a plurality of first air passages extending from a front portion through a rear portion of the cap body and are angularly spaced apart from each other, and second air passages formed in the front portion and having radial first sections and axial second sections. A voice coil is disposed around the washer and the magnet within the yoke. A diaphragm is disposed adjacent to the front portion of the cap body and is connected to the voice coil. A protective cover has an annular surrounding wall coupled to the front portion of the cap body without covering the second air passages, and a perforated cover plate disposed proximate to the diaphragm. An air chamber unit is coupled to the rear portion of the cap body and is in communication with the first air passages.

Abstract: A microphone battery case is disposed in the hand grip of the microphone and is provided with a battery slot for receiving removably a battery mount on which a plurality of batteries are mounted. The battery slot is provided with a slide rail and a spring. The battery case is provided with two elastic clamp pieces, each having a hook. The battery mount is provided with two hanging frames, and a projection. The battery mount is received in the battery slot such that the projection of the battery mount is guided by the slide rail of the battery slot, and that the spring is compressed by the battery mount, and further that the hanging frames of the battery mount are caught by the hooks of the elastic pieces of the battery case.

Abstract: A micro-microphone, for attachment to the clothing or directly to the body of a user, has a housing with a housing mantle, an end plate connected to a first end of the housing mantle, and a bottom plate connected to the second end of the housing mantle. The housing mantle has one or more openings, each covered by a membrane positioned external to the housing mantle. The housing and the membranes thus define an inner hollow space inside the housing. A flaccid diaphragm is connected externally to a portion of the housing and encloses together with the portion of the housing a compensation chamber. The flaccid diaphragm seals the compensation chamber moisture-tightly. A component of high acoustic impedance connects the inner hollow space inside the housing to the compensation chamber. Pressure compensation is thus realized while moisture is excluded from the interior of the microphone.

Abstract: The present invention provides a microphone in which a first acoustic capacity for mainly determining resonance frequency and a second acoustic capacity for mainly determining resonance sharpness are defined in a resonance portion, said first acoustic capacity and said second acoustic capacity being arranged in parallel in a direction of crossing relative to a moving direction of a sound wave, said second acoustic capacity capable of being communicated with only said first acoustic capacity to control resonance frequency.

Abstract: A microphone in which a diaphragm which is vibrated by a sound wave received, and a conversion portion such as a magnetic circuit for electrically acting on the diaphragm to convert the vibration into an electric signal are incorporated into a unit case, wherein a first elastic body and a second elastic body are arranged on the upper surface and the lower surface, respectively, of an peripheral edge portion of the diaphragm, the diaphragm is mounted on the unit case through the first elastic body on the upper surface of the peripheral edge portion thereof, and one end side of the conversion portion is placed in contact with the second elastic body arranged on the lower surface of the peripheral edge portion of diaphragm to encase the conversion portion into the unit case.

Abstract: An ultrasonic emitter device having broad frequency range capacity with relatively large diaphragm displacement compared to typical electrostatic diaphragm movement. The device includes a core member able to establish a variable magnetic field adjacent the core member. A movable diaphragm is stretched along and displaced a short separation distance from the core member to allow an intended range of orthogonal displacement of the diaphragm within a strong portion of the magnetic field. At least one conductive ring disposed on the movable diaphragm within the influence of the variable magnetic field of the core member for enabling current flow through the ring for developing a second magnetic field which interacts with the first magnetic field to repel and relax the diaphragm at a desired frequency for development of a series of compression waves which may be adjusted to include an ultrasonic frequency range.

Abstract: A microphone housing system is disclosed having a tapered structure enclosed within the housing structure coupled to a rear portion of a microphone element. In the preferred embodiment, the tapered portion has a generally conic shape expanding away from the rear portion of the microphone element. The housing structure surrounding the tapered structure has a plurality of radially disposed opening or slots and fully or partially covered with a sound-resistive material. The housing system provides increased front-to-back signal ratio and increased overall gain and frequency response due to superior rear signal cancellation.

Abstract: A hermetically sealed condenser microphone including an outer sealing diaphragm hermetically sealing an electroacoustic transducer within a case from the outside environment. The sealing diaphragm passes sound undiminished through an underlying intervening air space to a second active diaphragm of the electroacoustic transducer. Specifically, the case has a hollow interior, a sealed end and an open end. The electroacoustic transducer is disposed within the hollow interior of the case, and the sealing diaphragm disposed over the top of the open end of the case such that the hollow interior of the case is completely sealed. An acoustic signal first impinges upon the sealing diaphragm causing deflections therein which in turn recreate the acoustic signal undiminished in the air space within the case between the sealing diaphragm and the active diaphragm.