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handle: 10261/7249
[ES] El método Adrienne combina el método MLS con la técnica de la substracción de señal para el cálculo in situ de la RL de una barrera antirruido. Las señales directa y reflejada en la muestra se extraen de las trazas directa y reflejada, respectivamente, por ventaneo. La frecuencia más baja fiable del método depende de la duración de la ventana. Para que esta frecuencia sea mínima, la separación entre los eventos reflejado en la muestra y difractado en el altavoz o reflejado en el suelo ha de ser máxima. Dada la semi-altura de la barrera y la separación micrófono-muestra, este trabajo presenta la separación altavoz-micrófono óptima para mínima frecuencia más baja fiable.
[EN] The Adrienne method combines the MLS method with the signal subtraction technique. The MLS method affords the impulse response of the system. The subtraction technique allows to separate optimally the direct and sample-reflected signals. Maximum separation between the sample-reflected and the nearest events in the reflection trace is required in order the lowest reliable frequency to be minimum. Therefore, the microphone should be as close as possible to the sample whilst the loudspeaker should be as far as possible to the sample. As a consequence, the direct and sample-reflected events in the trace are close each other.
7 pp.-- PACS nr.: 43.50.Gf.-- Comunicación presentada en los siguientes congresos: XXX Jornadas Nacionales de Acústica – TecniAcústica 1999. Encuentro Ibérico de Acústica (Ávila, 20-22 Octubre 1999).
This work deals with the optimization of the loudspeaker-microphone setup, given the sample height, in order to get the best lowest reliable frequency.
Se agradece la financiación de los Proyectos SMT MAT-CT94049 "ADRIENNE", de la UE, y AMB97-1175-C01-03, de la CICYT.
Publicado en número especial de la Revista de Acústica: Vol 30(1999).
Peer reviewed
Signal subtraction technique, Maximum Length Sequence (MLS) method, Loudspeaker-microphone setup, Optimal separation, Adrienne method, Sample-reflected signal, Maximum Length Sequence (MLS) methods
Signal subtraction technique, Maximum Length Sequence (MLS) method, Loudspeaker-microphone setup, Optimal separation, Adrienne method, Sample-reflected signal, Maximum Length Sequence (MLS) methods
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