Machine tool structure for noise reduction
Marine exhaust system
Marine vessel noise attenuating structure
Marine wet exhaust system and improvements in powered marine ves
Masking sound generator
Mechanical filter for an electrodynamic transducer
Mechanical two-way loudspeaker
Mechanically operable acoustic filter
Membrane type electro-acoustic transducer
Method and device for utilization of a stethoscope as a...
Method and device for utilization of a stethoscope as a...
Method and device for utilization of a stethoscope as a...
Method and devices for the omnidirectional radiation of sound wa
Method for manufacturing an ear device and ear device
Method for manufacturing an ear device and ear device
Method for manufacturing an ear device and ear device
Method for manufacturing an ear device and ear device
Method for manufacturing an ear device and ear device
Method for retaining a hearing aid in place and hearing aid harn
Method of manufacturing an in-the-ear hearing aid, auxiliary too