An apparatus for measuring loss of sound traveled in a muffler of an automobile comprises: a first and second pipe between which the muffler, to be tested, is inserted; a sound source connected to one end of the first pipe opposite to the muffler to create a sound into the first and second...http://www.google.fr/patents/US5792955?utm_source=gb-gplus-shareBrevet US5792955 - Apparatus for measuring a loss of sound traveled in a muffler of an automobile
Apparatus for measuring a loss of sound traveled in a muffler of an ...
