Hand held warning bell
Headset for separation of speech signals in a noisy environment
Hearing aid
Hearing aid wax guard
Hearing aid with a housing to be worn behind the ear
Heated air horn
High efficiency buzzer
High efficiency fan with adaptive noise cancellation
High output audible alarm device utilizing a piezoelectric...
High-gain directional transducer array
High-hat cymbal stand and method of setting up the same
High-power ultrasound generator and use in chemical reactions
Highway crossing bell apparatus
Honeycomb structure, especially for sound absorption, and...
Horn for sportfans
Horn speaker
Horn with buzzer
Hybrid active silencer
Hybrid active vibration control method and device,...
Hybrid active-passive noise and vibration control system for...