Acoustic actuator and passive attenuator incorporating a...

Apparatus and method for active control of sound transmission th

Circuit to improve transducer separation in handsfree telephone

Device for use in an audio signal processing system

Echo/noise canceling device for use with personal computers

Hard disk drive with self-contained active acoustic noise...

Mass injection for reducing flow-induced resonance in a cavity

Noise canceling microphone system and method for designing...

Noise canceling microphone with acoustically tuned ports

Reactive sound absorber

Reducing flow-induced resonance in a cavity

Simultaneous enhancement of transmission loss and absorption...

Smart panel for decreasing noise in wide band frequency