Adaptive multifrequency reactive muffler
Adaptive noise generating device
Adaptive resonator vibration control system
Adaptor for coupling plural compression drivers to a common...
Adjustable circumference floor tom stand
Adjustable quiet seat
Adjustable warning buzzer
Advanced sound reduction tape
Aerosol operated horn
Air horn
Air operated ultrasonic transducer
Air powered signaling system
Air-coupled surface wave structures for sound field...
Aircraft acoustic attenuation member and method for forming...
Aircraft cabin noise control apparatus
Alarm device
All weather safety whistle and sound generator
An acoustic face of polymer and embedded coarse aggregates...
An acoustic reflector
An acoustic warning device, particularly for motor vehicles