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 signals, are analyzed and discussed in this paper.
Impulse responses measured with MLS or Swept-sine signals: a comparison between the two methods applied to noise barriers measurements / Guidorzi P.; Garai M.. - ELETTRONICO. - 1:(2013), pp. 8914-01-8914-10. (Intervento presentato al convegno 134th AES Convention tenutosi a Roma nel 04-07/05/2013).
Impulse responses measured with MLS or Swept-sine signals: a comparison between the two methods applied to noise barriers measurements
GUIDORZI, PAOLO;GARAI, MASSIMO
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 signals, are analyzed and discussed in this paper.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.