In the 领域 of 作曲 the 概念 of the 声 符号 or Sound-as-Symbol is a 手段(意味着) of attempting to 理解 电子声学 音乐 whose discourse and narrativity is 基于 on 关系 between 声 selected 精确 for their 参考 or extrinsic signifying 潜力 This approach should be 比较 to the 舍费尔 概念 of 化约 聆听 Closely 相关 are the 概念 of 声 serving metaphorical or metonymic 功能（函数） within signifying practice Trevor Wishart has written extensively on the subject

Certain 声 such as the sea wind 雷 machines bells and so on may carry symbollic 功能（函数） within cultures In the 领域 of 声音景观（声景） 研究 声 within our everyday 环境 may be classified analysed and 研究 in 术语 of any such symbolism Chapter 12 of R Murray Schafer's seminal book on the 声音景观（声景） The 调音系统 of the World Knopf 1977 represents an early 例如 of such a discussion