A modular speaker (100) includes a main module (200) defining a speaker (20) and including a cabinet (21) extending along a longitudinal axis (X) between a first and a second end (21a, 21b), a sound transducer (22), provided at the first end (21a) of the cabinet (21) and a connection circuit (23), provided at the second end (21b) of the cabinet (21). The modular speaker (100) also includes a rear module (300) selectable from a plurality of rear modules (300) and connectable reversibly to the second end (21b) of the cabinet (21) and a front module (400), defining an acoustic accessory selectable from a plurality of front modules (400) and connectable reversibly to the first end (21a) of the cabinet (21).

A microphone-speaker device includes a speaker, a microphone configured to capture sound and output an audio data signal and a housing configured to contain the microphone and the speaker. The device also includes an electronic circuit having audio electronics coupled to the speaker, an Ethernet interface configured to connect the electronic circuit for communication with a security system through an Ethernet connection, a power extractor for extracting power from the Ethernet connection for powering the electronic circuit and the microphone, and processing electronics configured to process the audio data signal from the microphone.

A system and method for improving hearing enhancement solutions across a wide range of hearing devices, particularly for a wide-range of disparate user-provided hearing devices.

An integrated application assembly for a multimedia system includes a multimedia system module comprised of a panel and a multimedia circuit module. The multimedia circuit module includes a Bluetooth module, a plurality of USB connection modules, an audio input device, an AUX indicating lamp, and a volume adjusting module. The Bluetooth module includes a Bluetooth module switch and a Bluetooth connection indicating lamp. The Bluetooth module switch and the Bluetooth connection indicating lamp are mounted on the panel. A plurality of audio output devices is connected to the multimedia system module. The multimedia system module and the audio output devices are mounted on a piece of furniture to achieve an integrated application.

The present disclosure relates to a headset which is configured to receive a detachable arm, wherein the detachable arm comprises an arm input transducer. The headset may be configured to be operated in different modes depending on the arm being attached or not. The headset may be configured to detect if the arm is attached or not. A set of magnets may be used to keep the arm attached to the earcup while allowing a user to detach the arm from the earcup.

Various implementations include portable speakers with detachable wireless transmitters. In some particular aspects, a portable speaker includes an enclosure housing: at least one electro-acoustic transducer for providing an audio output, a processor coupled with the at least one transducer; an audio input module coupled with the processor for receiving audio input signals; and an input channel for receiving a hard-wired audio input connection at the enclosure; at least one wireless transmitter detachably housed in the enclosure and in communication with a corresponding wireless input channel for receiving audio input from a source device.

A microphone includes: a first connection port for connecting to an external device; a second connection port for connecting to a second microphone via a cable; and a determination part that determines to be in a master mode, in which electric power is supplied through the second connection port to the second microphone connected via the cable, when the cable is connected to the second connection port in a state where electric power is supplied from the external device through the first connection port, and determines to be in a slave mode, in which electric power is supplied through the second connection port from the second microphone connected via the cable, when the cable is connected to the second connection port in a state where no electric power is supplied through the first connection port.

An audio preamplifier (1) for a microphone, including: a chassis (2) with at least one audio input (17) and at least one audio output, a control panel (3) including a gain selector (10) being arranged on one of the sides of the chassis (2), the chassis (2) further including a receiving compartment inside which a first connector is arranged; and a cartridge (6) comprising a preamplification circuit and a gain control circuit, the cartridge (6) further having a second connector complementary to the first connector, the cartridge (6) being configured for being inserted in a removable manner into the receiving compartment of the chassis (2) so as to connect the first and second connectors. An audio preamplification kit includes an audio preamplifier (1) and a plurality of additional cartridges.

An aspect of the disclosure relates to an apparatus, including an audio interface including first and second outputs; a crosstalk cancelling circuit including first and second inputs coupled to the first and second outputs of the audio interface, respectively; a first summer including a first input coupled to the first output of the audio interface and a second input coupled to a first output of the crosstalk cancelling circuit; a second summer including a first input coupled to the second output of the audio interface and a second input coupled to a second output of the crosstalk cancelling circuit; a first digital to analog converter (DAC) including an input coupled to an output of the first summer; and a second DAC including an input coupled to an output of the second summer.

The present disclosure provides a sound producing device, at least comprising a housing assembly. The housing assembly comprises a housing and a sealing member. The housing is provided with a plug-in hole, and the plug-in hole runs through a side wall of one side of the housing; the sealing member is used for plugging and sealing the plug-in hole; the plug-in hole comprises at least one hole wall segment provided along a plugging direction of the sealing member; the cross-sectional area of a reference cross section of at least part of the at least one hole wall segment perpendicular to the plugging direction of the sealing member increases gradually along the plugging direction; the sealing member is in plugging fit with the at least one hole wall segment.