Montage-related Variability in the Characteristics of Envelope Following Responses. Issue 5 (22nd September 2021)

• Record Type: Journal Article
• Authors: Urichuk, Matthew; Easwar, Vijayalakshmi; Purcell, David
• Is Part Of: Ear and hearing. Volume 42:Issue 5(2021)
• Page Start: 1436
• Page End: 1440
• Publication Date: 2021-09-22
• Subjects: Amplitude modulation -- Electrode montage -- Envelope-following response -- Frequency-following response -- Fricative -- Speech stimulus -- Vowel; Hearing disorders -- Periodicals; Audiology -- Periodicals; 612.85
• DOI: 10.1097/AUD.0000000000001018
• Languages: English
• ISSNs: 0196-0202

Abstract

Abstract : Objectives: The study aimed to compare two electrode montages commonly used for recording speech-evoked envelope following responses. Design: Twenty-three normal-hearing adults participated in this study. EFRs were elicited by a naturally spoken, modified /susa∫i/ stimulus presented at 65 dB SPL monaurally. EFRs were recorded using two single-channel electrode montages: Cz-nape and Fz-ipsilateral mastoid, where the noninverting and inverting sites were the vertex and nape, and the high forehead and ipsilateral mastoid, respectively. Montage order was counterbalanced across participants. Results: Envelope following responses amplitude and phase coherence were significantly higher overall in the Cz-nape montage with no significant differences in noise amplitude. Post hoc testing on montage effects in response amplitude and phase coherence was not significant for individual stimuli. The Cz-nape montage also resulted in a greater number of detections and analyzed using the Hotelling's T 2 . Conclusions: Electrode montage influences the estimated characteristics of speech-evoked EFRs.