声学 标准等响曲线

[中文适用范围]： 本文件规定了人类听众认为同样响亮的纯连续音调的声压级和频率的组合。 该规范基于以下条件： a) 听者不在场时的声场由自由渐进平面波组成； b) 声源位于听者的正前方； c) 声音信号为纯音； d) 声压级是在听者不在场的情况下，在听者头部中心位置测量的； e) 双耳聆听； f) 听众是年龄在 18 岁至 25 岁（含）之间的耳科正常人士。 对于从 20 Hz 到 12500 Hz（含）的三分之一倍频程系列中的首选频率，数据以图形形式在附件 A 中给出，以数字形式在附件 B 中给出，符合 [外文原描述]： This document specifies combinations of sound pressure levels and frequencies of pure continuous tones which are perceived as equally loud by human listeners. The specifications are based on the following conditions: a) the sound field in the absence of the listener consists of a free progressive plane wave; b) the source of sound is directly in front of the listener; c) the sound signals are pure tones; d) the sound pressure level is measured at the position where the centre of the listener's head would be, but in the absence of the listener; e) listening is binaural; f) the listeners are otologically normal persons in the age range from 18 years to 25 years inclusive. The data are given in graphical form in Annex A and in numerical form in Annex B for the preferred frequencies in the one-third-octave series from 20 Hz to 12 500 Hz, inclusive, in accordance with ISO 266 .