Describes procedures for the measurement of sound pressure levels in the outdoor environment, considering the effects of the ground, of refraction due to wind and temperature gradients, and of turbulence. The measured sound pressure levels can be used to calculate sound pressure levels at other distances from the source or to extrapolate to other environmental conditions or to assess compliance with regulation. Describes two methods: 1: general method, outlines conditions for routine measurements; 2: precision method, describes strict conditions for more accurate measurements.
Số hiệu tiêu chuẩn
ANSI/ASA S 12.18
Tên tiêu chuẩn
American National Standard Procedures for Outdoor Measurement of Sound Pressure Level
Ngày phát hành
1994-00-00
Tiêu chuẩn liên quan
IEC 60651*CEI 60651 (1979) * ANSI S 1.4 (1983) * ANSI S 1.11 (1986) * ANSI S 1.13 (1971) * ANSI S 1.26 (1978) * ANSI S 1.40 (1984) * ANSI S 12.9 (1988) * IEC 60804 (1984) * ISO 1996-1 (1982-09) * ISO 2613-1 (1993)
Từ khóa
Acoustic measurement * Acoustics * Airborne sound * Atmospheric influences * Definitions * Environmental condition * Exterior areas * Influence of climate * Measuring techniques * Noise levels * Outdoor * Sound attenuation * Sound level * Temperature * Turbulence * Winds * Airborne noise
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