ACOUSTICAL PROPERTIES OF AIRCRAFT NOISE MEASURED BY TEMPORAL AND SPATIAL FACTORS

✍ Scribed by K. FUJII; Y. SOETA; Y. ANDO

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 194 KB
• Volume: 241
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.2000.3278

✦ Synopsis

Acoustical properties of aircraft noise were investigated by means of temporal and spatial factors in sound "elds based on the model of auditory}brain system (see reference [10]). The model consists of the autocorrelation and crosscorrelation mechanisms for sound signals arriving at two ears and the specialization of human cerebral hemisphere. There are four temporal factors extracted from the autocorrelation function (ACF): (1) sound energy (0); (2) e!ective duration of ACF, ; (3) delay time of the "rst peak, ; and (4) its amplitude . From the interaural crosscorrelation function (IACF), three spatial factors are extracted as (1) magnitude of the interaural crosscorrelation IACC (2) interaural delay time at IACC, '!! , and (3) width of the maximum peak of the IACF, = '!! . It is found that the acoustical properties are well represented by the factors extracted from the ACF and the IACF.