Active sub-woofer speaker system

Actuation of floor systems using mechanical and...

Adjustable behind-the-ear communication device

Adjustable bluetooth wireless earphone

Adjustable clip-on headphones

Adjustable ear canal retention transceiver/receiver

Adjustable ear canal retention transceiver/receiver

Adjustable earphone with a microphone

Adjustable earphones for personal audio and communication...

Adjustable hanging-type earphone

Adjustable headphone

Adjustable headset

Adjustable headset

Adjustable holder for an acoustic pick-up device

Adjustable loudspeaker

Adjustable mechanism for improving headset comfort

Adjustable microphone apparatus

Adjustable microphone boom with acoustic valve

Adjustable microphone stand

Adjustable sound capturing device (MICTUBZ)