Capsule for housing unidirectional microphone of e.g. hands free telephony device integrated autoradio in car, has cavity with volumes arranged at sides of other volume to modify microphone directivity and compensate delay, respectively

摘要

The capsule (10) has a cavity (12) i.e. hollow space, including two open ends (14, 16) and a volume that houses an unidirectional microphone, where the capsule is made of elastic material e.g. elastomer or rubber and is in the form of envelope, box, case, cover or shell. A pipe shaped volume is arranged at one side of the former volume for modifying directivity of the unidirectional microphone. Another volume is arranged at another side of the former volume for compensating acoustic delay that is generated by the pipe shaped volume.