A Review of Current Techniques for Measuring Muffler Transmission Loss University of Kentucky

Format:

Conference/Event

Author/Creator:

Tao, Z., author.

Conference Name:

SAE 2003 Noise & Vibration Conference and Exhibition (2003-05-05 : Grand Traverse, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

The most common approach for measuring the transmission loss of a muffler is to determine the incident power by decomposition theory and the transmitted power by the plane wave approximation assuming an anechoic termination. Unfortunately, it is difficult to construct a fully anechoic termination. Thus, two alternative measurement approaches are considered, which do not require an anechoic termination: the two load method and the two-source method. Both methods are demonstrated on two muffler types: (1) a simple expansion chamber and (2) a double expansion chamber with an internal connecting tube. For both cases, the measured transmission losses were compared to those obtained from the boundary element method. The measured transmission losses compared well for both cases demonstrating that transmission losses can be determined reliably without an anechoic termination. It should be noted that the two-load method is the easier to employ for measuring transmission loss. However, the two-source method can be used to measure both transmission loss and the four-pole parameters of a muffler

Notes:

Vendor supplied data

Publisher Number:

2003-01-1653

Access Restriction:

Restricted for use by site license