High voltage generating device

High-power transmission acoustic antenna

High-tone control circuit

Highly directive endfire loudspeaker array

Holding device for the attachment of a microphone to an object

Horn speaker

Housing for a hearing aid, hearing aid, and a method of...

Housing for electro-acoustic transducer, and application of...

Housing shell for an in-the-ear hearing aid and method and...

Howling control device and howling control method

Howling frequency component emphasis method and apparatus

Hybrid behind-the-ear and completely-in-canal hearing aid

Hybrid loudspeaker system, at option with one or more...

Hybrid piezoelectric and magnetostrictive actuator

Hybrid resonant structure

Hydrophone

Hydrophone

Hydrophone demodulator circuit and method

Hydrophone for reception of acoustic or seismic waves

Hydrophone module for a marine seismic cable