Abstract: A condenser microphone includes: a true condenser microphone (TCM) pickup operable to generate an input signal at a high impedance corresponding to sound picked up thereby; an impedance conversion circuit connected electrically to the TCM pickup, and operable to convert the input signal from the TCM pickup to a converted signal at a low impedance; an amplifier circuit connected electrically to the impedance conversion circuit, disposed to receive a power signal, and operable for amplifying the converted signal so as to generate an output signal; and a phantom voltage module connected electrically to the TCM pickup, disposed to receive the power signal, and operable for generating a phantom signal from the power signal, the phantom signal having a voltage higher than that of the power signal and being provided to the TCM pickup for charging the TCM pickup.

Abstract: An audio pick-up device of a condenser microphone includes a base, a resilient anti-shock mount disposed fixedly on the base, and an audio pick-up unit disposed securely on the anti-shock mount for sensing and processing sound waves to output corresponding electric signals. The audio pick-up device further includes a circuit unit that includes an impedance converter circuit board and a control circuit board. The impedance converter circuit board is disposed securely on the anti-shock mount and is connected electrically to the audio pick-up unit for converting a high-impedance output of the audio pick-up unit to a low-impedance output. The control circuit board is mounted on the base and is coupled electrically to the impedance converter circuit board for receiving and processing the electric signals therefrom.

Abstract: A microphone includes a grip and an audio pick-up unit mounted to one end of the grip. The microphone further includes a switch disposed in the grip and having an operable part that is movable relative to the grip between on and off positions. The microphone also includes a switch actuator movably disposed on the grip, coupled to the operable part of the switch, and manually operable to drive the operable part to move between the on and off positions. The microphone further includes a locking member movably disposed on the grip and manually operable for movement between a locking position and an unlocking position.

Abstract: A wireless microphone includes a perforated front cover mounted on a front open end of a tubular housing, and a control module mounted fixedly on a rear open end of the housing and having an outer surrounding surface provided with a power switch and electrode plates. A rear cover is connected detachably to the control module, and is formed with a switch-receiving groove and through holes. The rear cover is operable so as to be disposed between an adjusted position, where the power switch is exposed from the switch-receiving groove and where the electrode plates are respectively exposed from the through holes, and a used position, where the power switch and the electrode plates are fully covered by the rear cover. A positioning member positions the rear cover at a selected one of the used and adjusted positions.

Abstract: A wireless microphone includes a perforated front cover mounted on a front open end of a tubular housing, and a control module mounted fixedly on a rear open end of the housing and having an outer surrounding surface provided with a power switch and electrode plates. A rear cover is connected detachably to the control module, and is formed with a switch-receiving groove and through holes. The rear cover is operable so as to be disposed between an adjusted position, where the power switch is exposed from the switch-receiving groove and where the electrode plates are respectively exposed from the through holes, and a used position, where the power switch and the electrode plates are fully covered by the rear cover. A positioning member positions the rear cover at a selected one of the used and adjusted positions.

Abstract: A battery casing includes a battery seat, a hinged cover and an ejector member. The hinged cover is mounted pivotally to the battery seat for pivoting about a horizontal pivot axis so as to be movable between open and closed positions. The ejector member has a first end portion extending into the battery chamber, and a second end portion opposite to the first end portion and extending out of the battery chamber. The second end portion of the ejector member engages the side wall of the hinged cover. When the hinged cover is moved to an open position, the second end portion of the ejector member moves with the side wall of the hinged cover so as to cause corresponding upward movement of the first end portion of the ejector member away from the base wall, thereby enabling the ejector member to eject the battery from the battery chamber.

Abstract: A battery casing includes a battery seat, a hinged cover and an ejector member. The battery seat has a base wall and a surrounding wall unit which cooperatively form a battery chamber with a top opening. The hinged cover has a top wall and a side wall extending downwardly from the top wall and having a lower hinge end portion which is disposed adjacent to the surrounding wall unit and externally of the battery chamber, and which is mounted pivotally to the battery seat for pivoting about a horizontal pivot axis so as to be movable between open and closed positions. The ejector member is disposed on the surrounding wall unit, and has a first end portion extending into the battery chamber, and a second end portion opposite to the first end portion and extending out of the battery chamber. The second end portion of the ejector member engages the side wall of the hinged cover.