1 This pair of 术语 提及 to a 系统 ability to reproduce a full 高保真 or less than full 低保真 音频 频率 频谱 20 to 20 000 赫兹 and a favourable 高保真 or poor 低保真 信噪 比 通常 applied to an 放大器 or a 录音

A key determinant of fidelity is 频率 响应/反应 This is the measure of the 输出 of a sound-producing body stimulated with 频率 over a 特定 范围（排列） 通常 the 整体 范围（排列） of 听觉 20 to 20 000 赫兹 Also called a 共鸣 曲线

The 共鸣 of a 音乐 乐器 result in an uneven 频率 响应/反应 of that 乐器 whereas for the ideal 扬声器 the 频率 响应/反应 should be 平（坦） that is all 频率 should be reproduced equally well to achieve good fidelity 化约 from Barry Truax - Handbook for Acoustic 生态学 CD-ROM Edition Cambridge Street 出版 1999 - CSR-CDR 9901

2 R Murray Schaffer 介绍 the 概念 of a 高保真 and 低保真 声音景观（声景） In a 高保真 声音景观（声景） we can 清楚 perceive 声 and their orientation 位置 and 距离 within the acoustic 空间 In a 低保真 声音景观（声景） the 声音 空间 is confused individual 声 lose their identity and 掩蔽 for 例如 by 持续 traffic 噪音 is common

3 Much 电子声学 音乐 could be said to 显示 an 美学 preference for 高保真 录音 再现 and 聆听 situation Some practitioners conceive of an ideal situation in which there is a transparency of the 技术 手段(意味着) and proceedures used in 作曲 and 表演 Others draw the attention of the 听众 to the 技术 手段(意味着) of 制作 to the extent that this may become an 方面 of the signifying 潜力 narrativity or discourse of the 音乐 Indeed it is 可能 to 创作 a 音乐方面 significant 连续统一 between 高保真 and 低保真 during the course of a 作品 Some pracitioners and 风格 e g 故障 celebrate and aesthetically privilege a 低保真 approach to 声