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Convention Paper

Impulse Responses Measured with MLS or Swept-Sine Signals: A Comparison between the Two Methods Applied to Noise Barrier Measurements

Authors: Guidorzi, Paolo; Garai, Massimo

AES Convention 134 · Paper 8914 · May 2013

Abstract

A sound source and a microphone grid are used for measuring a set of impulse responses with the purpose of estimating the in-situ acoustical characteristics of noise barriers (sound reflection and airborne sound insulation) following the CEN/TS 1793-5 European standard guidelines as improved by the European project QUIESST. The impulse responses are measured using MLS (Maximum Length Sequence) and Swept-sine signals. The acoustical characteristics of the noise barrier, obtained using the two signals, are generally equivalent, but in some critical measurement conditions a discrepancy can be found. Differences and advantages between measurements, obtained by means of MLS or Swept-sine methods are analyzed and discussed in this paper.

Details

Published in
AES Convention 134
AES Convention
134
Paper number
8914
Publication date
May 6, 2013
Session subject
Measurements and Modeling
Affiliation
University of Bologna, Bologna, Italy (See document for exact affiliation information.)
Type
Convention Paper