Water gun with sound effects module

Water resistant audible toys with sound effects

Water-proof geophone housing

Water-proof sound apparatus

Waterproof earmold-to-earphone adapter

Waterproof speaker

Waterproofing loudspeaker cones

Watertight apparatus capable of being immersed and including...

Wave interference silencer

Wave interference silencer construction

Wave shaping sound chamber

Wax guard for hearing aids

Wax guard membrane for hearing aids

Weatherproof loudspeaker assembly and method of making same

Weatherproof sound attenuating device

Weight-drop seismic exploration system

Well borehole salinity measurement using acoustic velocity

Well borehole sound source

Well logging instrument guide apparatus

Wellbore signal generator