Document Detail

Analysis of voice change during cellular phone use: a blinded controlled study.
MedLine Citation:
PMID:  19497708     Owner:  NLM     Status:  MEDLINE    
It is a growing belief that cellular phone use may be hazardous to the voice. This study aims to assess voice production in different conversational scenarios to identify any changes in vocal production that may be specific to cellular phone use. Twenty healthy participants were randomized to seven conversational scenarios: quiet conditions face to face; quiet conditions over a landline; quiet conditions using a cellular phone (QCP); quiet conditions using cellular phone with earpiece (QCPE); noisy conditions face to face (NFF); noisy conditions using cellular phone (NCP); and noisy conditions using cellular phone with earpiece (NCPE). In each condition, participants performed spontaneous speech, a standardized reading passage, and sustained voicing. Sound pressure levels (dB SPL) and fundamental frequencies (F(0)[Hz]) were measured. Subjects completed a 100-mm visual analog scale measuring vocal effort after each speaking scenario. Statistical analysis was performed using analysis of variance (ANOVA). There was a significant difference in dB SPL and F(0) between all quiet conditions relative to all noisy conditions (P<0.001). There was no difference in cellular phone use relative to any other conversational condition in mean dB SPL, respective of ambient noise. Vocal effort was rated greater for noisy conditions compared with quiet conditions. Cellular phone use does not lead to a significant change in voice production relative to other speaking conditions. Voice problems associated with cellular phone use may simply be a function of the increased amount of voice use and increased vocal loudness (Lombard effect) associated with speaking in noisy situations rather than a variable inherent to the phone.
Marae B Shewmaker; Edie R Hapner; Marina Gilman; Adam M Klein; Michael M Johns
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2009-06-03
Journal Detail:
Title:  Journal of voice : official journal of the Voice Foundation     Volume:  24     ISSN:  1873-4588     ISO Abbreviation:  J Voice     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-05-11     Completed Date:  2010-08-09     Revised Date:  2013-05-02    
Medline Journal Info:
Nlm Unique ID:  8712262     Medline TA:  J Voice     Country:  United States    
Other Details:
Languages:  eng     Pagination:  308-13     Citation Subset:  IM    
Copyright Information:
(c) 2010 The Voice Foundation. Published by Mosby, Inc. All rights reserved.
Emory Voice Center, Emory Crawford Long Hospital, Atlanta, Georgia, USA.
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MeSH Terms
Analysis of Variance
Cellular Phone* / instrumentation
Interpersonal Relations
Middle Aged
Sex Characteristics
Speech Acoustics
Speech Production Measurement
Time Factors
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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