GB/T 20248-2006 in English

《GB/T 20248-2006声学 飞行中飞机舱内声压级的测量》由TC17（全国声学标准化技术委员会）归口，主管部门为中国科学院。
本标准规定了稳态飞行中飞机舱内机组人员及乘客位置声压级测量时仪器设备的要求以及对测量方法和测量报告的要求.声压级可以用于确定描述飞机舱内声学环境的各种参量,本标准规定的测量方法旨在保证测量结果的一致性、提供确定测量不确定度的基矗本标准提供了从传声器到读出设备一套完整测量系统的电声性能技术指标。只要总测量系统符合本标准技术指标，则可选择各种不同的测量系统部件。推荐的测量方法既可将声压信号记录下来进行1/3倍频带声压级分析，也可直接进行1/3倍频带声压级测量。

Scope

This standard specifies the requirements for instruments and equipment, measurement methods and measurement reports for the measurement of the sound pressure level of the crew and passengers in the aircraft cabin during steady flight. The sound pressure level can be used to determine various parameters describing the acoustic environment in the sub-cabin. The measurement methods specified in this standard aim to ensure the consistency of the measurement results and provide the basis for determining the measurement uncertainty. This standard provides the electroacoustic performance specifications for a complete measurement system from the microphone to the readout device. As long as the overall measurement system complies with the specifications of this standard, various measurement system components are optional. The recommended measurement method can not only record the sound pressure signal for 1/3 octave band sound pressure level analysis, but also directly measure the 1/3 octave band sound pressure level.