Sound damping apparatus

Details Sound damping apparatus Sound damping apparatus

1975-11-06

1977-09-20

Franklin, Lawrence R.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

F01N 122

Patent

active

040490750

ABSTRACT:
A sound damping apparatus has a resilient wall that defines a first volume and rigid wall defining a second or third volume. One rigid wall may be a part of the device muffled. A gas entry communicates with the volume defined by the resilient wall. The resilient wall and the rigid walls are in contact such that gas pressure separates the walls and the wall to intermittently define gas passages between volumes. Fluid within the wall surrounding the resilient wall dampens resilient wall vibration.

REFERENCES:
patent: 3061039 (1962-10-01), Peters
patent: 3688869 (1972-09-01), Murphy
patent: 3779340 (1973-12-01), Hoffman et al.

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