Filter manipulator, filter, holder for a number of filter...

Filterbank structure and method for filtering and separating...

Filterbank structure and method for filtering and separating...

Filtering audio signals from a combined microphone/speaker earpi

Fireman's safety apparatus

Fireplace accessory

First draft-switching controller for personal ANR system

Fix mounted earphone jack

Fixation element for an implantable microphone

Fixation element for an implantable microphone

Fixation element for an implantable microphone

Fixation of speaker to a monitor

Fixed bandpass tone controlling

Fixed mounting loudspeaker with removable chassis

Fixed text speaker verification method and apparatus

Fixing assembly for a helmet headset

Fixing device for operating elements of hearing devices or...

Fixing device of speaker unit for portable computer

Flat acoustic conversion device

Flat panel loudspeaker arrangement