(A)STC Testing With MLS: Old Dog. New Tricks.

Authors

  • Ryan John Matheson Pinchin Ltd.

Abstract

Within ASTM E336: Standard Test Method for Measurement of Airborne Sound Attenuation between Rooms in Buildings, it states that the signal to be used for the testing be such that "the input signal to the amplifiers shall be random noise containing an approximately continuous distribution of frequencies over each test band. White or pink electronic noise sources satisfy this condition". Another signal that also meets the condition is a maximum length sequence, or MLS. Typically the author has seen MLS used in room acoustics measurements, mostly in the determination of a spaces reverberation time (RT60). Considering the MLS signals' well-established usefullness in room acoustics and the fact that it meets the signal condition in ASTM E336 the author explores the possible benefits in using MLS while performing (A)STC testing in the field. The focus of the work will be in using the MLS signal to obtain the RT60 in both receiver and source rooms without having to move the speaker from room to room or do additional RT60 measurements using other sources of sound.

Additional Files

Published

2017-08-19

How to Cite

1.
Matheson RJ. (A)STC Testing With MLS: Old Dog. New Tricks. Canadian Acoustics [Internet]. 2017 Aug. 19 [cited 2025 Feb. 15];45(3):68-9. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3095

Issue

Vol. 45 No. 3 (2017)

Section

Proceedings of the Acoustics Week in Canada

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