An in-line early reflection enhancement system for enhancing...

Animal call simulator

Anr headset with dual stereo jacks

Anti-noise guard for machine or conveyor

Anti-noise rocker arm cover

Apparatus and method for the active control of air moving...

Apparatus and method pertaining to a doorbell chime cover

Apparatus and methods for cleaning delicate parts

Apparatus for acoustically improving an environment

Apparatus for acoustically improving an environment and...

Apparatus for carrying mobile means of inspection in the...

Apparatus for degassing liquids

Apparatus for noise and air pollution abatement

Apparatus for producing artificial echoes

Apparatus for the redistribution of acoustic energy

Apparatus for use in investigating earth formations

Apparatus using waveguides dimensioned to undergo flexural...

Appliance incorporating sound cancellation system

Architectural sound enhancement system

Arrangement for active sound damping