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?

获取出现于非正式、无管控语境中的本土口语（vernacular speech）风格样本的需求，为声学分析所需的高质量音频录制带来了挑战。因此，社会语言学访谈要么采用相对正式且受管控的形式，此时产出的言语风格更为正式，同时可获得音质尚可的音频；要么处于非正式、无管控的语境，虽能采集到足量的本土口语，但音频质量偏低。这为本土口语的分析带来了困境。已有研究证实了噪声对嗓音质量特征的影响，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？应当规避哪些类型的噪声？