ISO 2969:2015规定了电影配音影院（混音室）、放映室和房间容积超过125 m3（4,414 ft3）的室内影院的B链的测量方法和特征电声频率响应。它旨在帮助在这种房间中监控和再现电影声音的标准化。目标是从一个装置到另一个装置以及从一个装置内的一个位置到另一个位置具有恒定的感知响度和频率响应。本国际标准不包括电影音响系统从换能器延伸到输入源音频选择器的部分。

ISO 2969:2015 specifies the measurement methods and characteristic electroacoustic frequency response of the B-chain of motion-picture dubbing theatres (mixing rooms), screening rooms, and indoor theatres whose room volume exceeds 125 m³ (4,414 ft³). It is intended to assist in standardization of monitoring and reproduction of motion-picture sound in such rooms. The goal is to have constant perceived loudness and frequency response from installation to installation, and from position-to-position within an installation. This International Standard does not cover that part of the motion-picture sound system extending from the transducer to the input source audio selector.