Sound absorbing muffler

Details Sound absorbing muffler Sound absorbing muffler

1991-03-28

1992-10-06

Gellner, Michael L.

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181252, 181264, 181270, 181280, F01N 102

Patent

active

051523663

ABSTRACT:
A sound absorbing muffler constuction is provided. The muffler includes a s conduit having an unobstructed gas flow path and a plurality of perforations passing through its walls along a portion thereof. A sound attenuator body encases the perforated portion of the gas conduit such that a sound absorbing space is formed between the outer wall of the gas conduit and the inner wall of the sound attenuator body. A plurality of parabolically shaped baffles are located in the sound absorbing space. Each baffle is radically disposed and axially extended along the direction of the gas flow. The baffles direction the propagation of acoustic energy entering the sound absorbing space such that the energy traverses a substantially longer path than if no baffles were present. Thus, the acoustic energy is subject to a greater amount of possible attenuation within the sound absorbing space.

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