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Título: | In situ absorption measurement of antinoise devices using pre-determined pulse waveforms |
Autor: | Cobo, Pedro CSIC ORCID; Fernández, Alejandro; Palacios, R.; Colina, Carlos de la CSIC; Siguero, Manuel | Palabras clave: | Antinoise devices Noise barriers Absorption coefficient Adrienne method Maximum Length Sequence (MLS) method Signal subtraction technique Inverse filtering techniques Waveform determination Loudspeaker-microphone setup |
Fecha de publicación: | sep-2004 | Editor: | Sociedade Portuguesa de Acústica | Citación: | XXXV Congreso Español de Acústica – TecniAcústica 2004. Metrological and experimental acoustics; ID22 | Resumen: | Noise barriers can be characterized by using the Adrienne method which combines MLS signals with the subtraction technique. This paper deals with a method to shape the loudspeaker-microphone impulse response which utilizes inverse filtering techniques to design the waveform radiated by the loudspeaker according to some prescribed criterion. For instance, zero-phase cosine-magnitude waveforms provide minimum length within a given frequency band. Therefore, this technique allows approaching the microphone to the loudspeaker, and as a consequence, reduces the lowest reliable frequency of the absorption measurement. | Descripción: | 8 pages, 6 figures.-- Comunicación presentada en: XXXV Congreso Español de Acústica – TecniAcústica 2004, IV Congreso Iberoamericano de Acústica, IV Congreso Ibérico de Acústica y EAA Symposium "Environmental and Architectural Acoustics" (Guimaraes, 14-17 Sep 2004). | URI: | http://hdl.handle.net/10261/8591 |
Aparece en las colecciones: | (IA) Comunicaciones congresos |
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