Apparatus for measuring a loss of sound traveled in a muffler of

Details Apparatus for measuring a loss of sound traveled in a muffler of Apparatus for measuring a loss of sound traveled in a muffler of

1996-08-20

1998-08-11

Oda, Christine K.

Measuring and testing

Vibration

By mechanical waves

73584, G01N 2920

Patent

active

057929556

ABSTRACT:
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 pipes; the first microphones mounted at the first pipe to measure the level of sound before the muffler; the second microphones mounted at the second pipe to measure the level of sound after the muffler; and a non-reflect means connected to the second pipe for the sound passing through the first and second pipes so as not to reflect into them.

REFERENCES:
patent: 4676111 (1987-06-01), Wagner

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