Acoustic conditioner
Active hearing protectors
Active noise reduction headset
Active noise reduction system
Active noise supressors and methods for use in the ear canal
Active sound absorber
Apparatus for communication and reconnaissance coupled with...
Apparatus for communication and reconnaissance coupled with...
Audio-signal detecting device
Directional ear device with adaptive bandwidth and gain control
Electroacoustic device for hearing needs including noise cancell
Electronic earplug for monitoring and reducing wideband...
Frequency selective sound blocking system for hearing protection
Headphone apparatus including an equalizer system having an open
Headphone assemblies
Headset for hearing protectors
Hearing protector
Hearing protector utilizing aural reflex mechanism
Low sound attenuating hearing protection device with filter...
Means for stabilizing sound pressure produced at the eardrum und