ISO 5129:2001 - The International Standard for Measurement of Noise in the Interior of Aircraft

摘要

The level of the sound in the cabin and cockpit of transport-category aircraft is a concern to the manufacturer, the aircraft operator, the passengers, the flight crew and the cabin crew. For manufacturers to provide fair and meaningful guarantees that the level of sound will not exceed a specified limit requires agreement on the acoustical quantity as well as where it is to be measured and under what conditions. As the passenger-carrying capacity of aircraft increases and as the competition for market share intensifies, the need increases for a uniform standard procedure to measure the level of the sound in the interior of aircraft. ISO 5129:2001, Acoustics -Measurement of sound pressure levels in the interior of aircraft during flight was published by ISO on 2001 October 01. This standard specifies requirements for instruments and test procedures for the measurement and reporting of sound pressure levels at crew and passenger locations in the interior of aircraft under steady flight conditions. The types of aircraft within the scope of the standard include helicopters, single-engine or multiple-engine propeller-driven airplanes, turboprop-powered airplanes, and jet-powered airplanes. The principal objective of the standard is to obtain measurements of one-third-octave-band sound pressure levels at standardized positions and under flight conditions that should yield reproducible results. Various acoustical quantities, such as A-weighted sound level, speech interference level, or wideband sound pressure level, may then be calculated from the one-third-octave-band sound pressure levels.