Any past or 消失 声音 remembered 怀旧 尤其 when 理想化 or otherwise 特定 special importance Whereas new 声音 are often experienced as 声音 恐惧 old or past 声音 are often elevated to the 类别 of 声音 romances in 内存（记忆） Many such 声音 were often regarded as unimportant when actually current yet later 听觉 them may 触发 strong 内存（记忆）

声音 experienced during 童年时期 for instance often become romances for the 成年 After moving away from a 特定 area 尤其 one strongly linked with 声音 such as a 团体 by the ocean to a place 缺乏 those 熟悉 声音 these may also 获得 a 浪漫 or nostalgic 品质 Other 声音 go beyond having only personal romance 品质 and are 价值 and 保存 by a 社会 as 声音标志（音标）

源 Barry Truax - Handbook for Acoustic 生态学 CD-ROM Edition Cambridge Street 出版 1999 - CSR-CDR 9901