Practical Considerations when using the Two-Load Method to Determine the Transmission Loss of Mufflers and Silencers

X. Hua, D. W. Herrin

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

The two-load method is commonly used to determine the transmission loss of a muffler or silencer. Several practical measurement considerations are examined in this paper. First of all, conical adapters are sometimes used to transition between impedance tubes and the muffler. It is demonstrated that the effect of adding the adapter can be quite significant at low frequencies especially if the adapter is short in length. The effect of changing the length of the adapter was examined via measurement and plane wave theory. Secondly, the effect of selecting the reference microphone was examined experimentally. It was found that measurements are improved by selecting a downstream reference. Finally, the effect of using different frequency response function estimation algorithms (H1, H2 and Hv) was compared sans flow. This had little effect on the measurement.

Original languageEnglish
JournalSAE Technical Papers
Volume4
StatePublished - 2013
EventSAE 2013 Noise and Vibration Conference and Exhibition, NVC 2013 - Grand Rapids, MI, United States
Duration: May 20 2013May 23 2013

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Fingerprint

Dive into the research topics of 'Practical Considerations when using the Two-Load Method to Determine the Transmission Loss of Mufflers and Silencers'. Together they form a unique fingerprint.

Cite this