Resumo

BARCELO PEREZ, Carlos. Fondos acústicos de la región nororiental de Cuba. Rev Cubana Hig Epidemiol [online]. 2001, vol.39, n.3, pp. 198-206. ISSN 1561-3003.

The sonority, the audible energy fraction, the stability of the sound level and the spectra of the pecentage constant bandwidth of noise sources characteristic of geomorphologic regions in the northeastern zone of Cuba were studied aimed at describing their acoustic backgrounds and to contribute to the microlocalization of human settlements of the projects under way. The method used was based on the determinations of summary measures at the stable sound levels and on the spectra of set points linked to different geomorphologic regions. The lowest levels of sonority and audibility corresponded to the least anthropical landscapes, which were the most forested and depressed by the relief, found in the high forestal zones of topographic complexity. It was observed a linear dependency between the parameters of the environment, in terms of height and metereology, and those of the sound of acoustic background. The sound spectra of the families of sources oscillated, but their trend proved to be esentially of 2 types: spectrally flat (white sound: fluvial waters, litorals and forests) and spectrally exponential (rose sound: high forests and pasturelands, anthropic noise). Energy decreased with the frequency. The physical parameters of the sound contrasted selective and significantly in 8 studied geomorphologic regions in the northeastern zone of Cuba. The urban, industrial and transportation sources marked acoustic singularities of the territory.

Palavras-chave : NOISE MEASUREMENT; ACOUSTIC STIMULATION;; ENVIRONMENT AND PUBLIC HEALTH;; SOUND CONTAMINATION..

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