The Recorder

The need to access vernacular speech styles, which appear in informal, uncontrolled environments poses a problem for the recording of audio high enough in quality for acoustic analysis. As a result, sociolinguistic interviews are either relatively formal and controlled resulting in more formal speech and decent quality audio OR informal, uncontrolled contexts with a decent level of vernacular speech yet low quality audio. This poses a problem for the analysis of vernacular speech. Studies show the effects of noise on voice quality properties but are noisy environments actually detrimental to analysis of formant frequencies? Does noise affect all formants equally? What types of noise should be avoided?

获取非正式、无约束场景下出现的本土口语语体的需求，为录制满足声学分析所需的高质量音频带来了挑战。因此，社会语言学访谈要么采用相对正式且受管控的场景，此时采集到的口语语体更为正式，音频质量尚可；要么采用非正式、无约束的场景，虽可采集到大量本土口语，但音频质量偏低。这为本土口语语体的分析工作带来了难题。已有研究证实了噪声对语音质量属性的影响，但嘈杂环境是否真的会对共振峰频率（formant frequencies）的分析产生不利影响？噪声是否会对所有共振峰产生同等影响？又应当规避哪些类型的噪声？