PMID: 8959607Dec 1, 1996Paper

Microphone sensitivity as a source of variation in nasalance scores

Journal of Speech and Hearing Research
D J ZajacR Mayo

Abstract

A two-part study was conducted to determine the sources of variation in nasalance scores derived from the Nasometer. In Study #1, a function generator was used as a signal source to calibrate and input sine and square waves directly into the Nasometer. Ten stimuli ranging from 105 to 330 Hz in 25 Hz increments were evaluated. In Study #2, the same signal source and an amplified loudspeaker were used to calibrate and present square waves to the nasometer via five different sets of microphones. The sound pressure level of all stimuli was maintained at 88 dB. Each microphone set was calibrated using the 105 Hz signals. Results from Study #1 indicated consistent nasalance scores across all frequencies (i.e., all scores were within 2% of calibration). Results from Study #2 demonstrated deviations greater than 2% from calibration as a function of frequency for all five sets of microphones. The smallest deviation was 5%, whereas the largest deviation was 14%. We suggest that the variation in nasalance as a function of stimulus frequency may be due to a mismatch in the sensitivity of microphones (i.e., different frequency response characteristics). It is further suggested (a) that individual investigators determine the response charact...Continue Reading

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Citations

Apr 5, 2013·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Gillian de Boer, Tim Bressmann
Nov 12, 2013·Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS·Mikyong ParkRongmin Baek
Aug 22, 2012·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Shaheen N Awan, Aneesha Virani
Jun 15, 2011·Clinical Linguistics & Phonetics·Areti OkalidouEleni Grigoraki
May 14, 2016·Journal of Communication Disorders·Kim BettensKristiane M Van Lierde
Aug 6, 1999·The Annals of Otology, Rhinology, and Laryngology·E M Hoolsema
Nov 15, 2016·Logopedics, Phoniatrics, Vocology·Kim BettensKristiane Van Lierde
Apr 11, 2001·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·C E Gildersleeve-Neumann, R M Dalston
Apr 11, 2001·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·T L Whitehill
Mar 8, 2005·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Elizabeth LacziJessica Huber
Sep 8, 2017·Logopedics, Phoniatrics, Vocology·Fadwa A KhwailehMa'moun Alrawashdeh
Aug 14, 2018·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Eshan PuaJamie L Perry
Apr 19, 2011·Journal of Speech, Language, and Hearing Research : JSLHR·Shaheen N AwanChristopher R Watts
Feb 24, 2001·Journal of Speech, Language, and Hearing Research : JSLHR·L H YoungC R Hooper
Sep 16, 2008·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Kerry E LewisAnn Blanton
Jan 6, 2004·The Journal of Craniofacial Surgery·Gwen R J SwennenRupert Dempf
Mar 6, 1999·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·J M ScarselloneJ F Wolfaardt
Oct 7, 1998·The Cleft Palate-craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association·Z MraJ Fenwick

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