Whether in the 工作室 or in the 领域（野外） a 声筒（麦克风） may be placed in close 近 to the 物理 源 of a 声波 近声筒 錄/录 is common in 電聲學/电声学 practice since it allows for the 捕捉 of rich 频谱 细节 that may serve an 重要 功能（函数） in the signifying 潜力 of 樂/乐 材料 or the 调查 and 处理 of this 细节 as a 结构 原则 in the 工作室 类比 could be made with macro-photography close-up shots or the 显微镜 Since there is very little 距 between 声筒（麦克风） and the cause of a 声波 近声筒 录音 will 通常 reveal little 信息 as to the acoustic 环境 in which the 錄/录 was 创作 which may be deemed an advantage if 材料 is to undergo later 变形 or 信号 处理