Semin Hear 2004; 25(2): 189-200
DOI: 10.1055/s-2004-828669
Copyright © 2004 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA.

Classroom Acoustic Measurements

Carl C. Crandell1 , Joseph J. Smaldino2 , Brian M. Kreisman1
  • 1Department of Communication Sciences and Disorders/Institute of the Advanced Study of Communication Processes, University of Florida, Gainesville, Florida
  • 2Department of Communicative Disorders, University of Northern Iowa, Cedar Falls, Iowa
Further Information

Publication History

Publication Date:
27 May 2004 (online)

The audiologist is often called upon to identify whether or not classroom acoustic conditions are appropriate for listening and learning. This article provides an overview of the methods that can be used by the audiologist to document acoustic conditions in a classroom. Specifically, procedures that can be used to establish signal-to-noise ratio, background noise level, and reverberation time are considered. Finally, typical recommendations to improve classroom acoustic conditions are discussed.

REFERENCES

  • 1 Bradley J. Speech intelligibility studies in classrooms.  J Acoust Soc Am. 1986;  80 846-854
  • 2 Lochner J, Burger J. The influence of reflections in auditorium acoustics.  J Sound Vibration. 1964;  4 426-454
  • 3 Nabelek A, Nabelek I. Room acoustics and speech perception. In: Katz J Handbook of Clinical Audiology, 4th ed. Baltimore, MD; Williams & Wilkins 1994: 624-637
  • 4 Bolt R, MacDonald A. Theory of speech masking by reverberation.  J Acoust Soc Am. 1949;  21 577-580
  • 5 Lochner J, Burger J. The influence of reflections in auditorium acoustics.  J Sound Vibration. 1964;  4 426-454
  • 6 Knudsen V, Harris C. Acoustical Designing in Architecture. New York; American Institute of Physics for the Acoustical Society of America 1978
  • 7 Kurtovic H. The influence of reflected sound upon speech intelligibility.  Acustica. 1975;  33 32-39
  • 8 Crum D. The effects of noise, reverberation, and speaker-to-listener distance on speech understanding [unpublished doctoral dissertation]. Evanston, IL; Northwestern University 1974
  • 9 Gelfand S, Silman S. Effects of small room reverberation upon the recognition of some consonant features.  J Acoust Soc Am. 1979;  66 22-29
  • 10 Nabelek A, Pickett J. Monaural and binaural speech perception through hearing aids under noise and reverberation with normal and hearing impaired listeners.  J Speech Hear Res. 1974;  17 724-739
  • 11 Nabelek A, Pickett J. Reception of consonants in a classroom as affected by monaural and binaural listening, noise, reverberation, and hearing aids.  J Acoust Soc Am. 1974;  56 628-639
  • 12 Crandell C. Classroom acoustics for normal hearing children: implications for rehabilitation.  Educ Aud Mono. 1991;  2 18-38
  • 13 Crandell C. Classroom acoustics for hearing impaired children.  J Acoust Soc Am. 1992;  92 2470
  • 14 Crandell C, Bess F. Speech recognition of children in a “typical” classroom setting.  ASHA. 1986;  29 87
  • 15 Finitzo-Hieber T, Tillman T. Room acoustics effects on monosyllabic word discrimination ability for normal and hearing-impaired children.  J Speech Hear Res. 1978;  21 440-458
  • 16 Finitzo-Hieber T. Classroom acoustics. In: Roeser R, Downs M Auditory Disorders in School Children, 2nd ed. New York; Thieme-Stratton 1988: 221-233
  • 17 Niemoeller A. Acoustical design of classrooms for the deaf.  Am Ann Deaf. 1968;  113 1040-1045
  • 18 Nabelek A, Robinette L. Reverberation as a parameter in clinical testing.  Audiology. 1978;  17 239-259
  • 19 Kreisman B. Simulated reverberation and speech perception: clinical implications. Paper presented at: the American Academy of Audiology 15th Annual Convention San Antonio, TX; April 2003
  • 20 Sabine W. Collected Papers on Acoustics. New York; Dover 1964
  • 21 Kosten C. International comparison measurements in the reverberation room.  Acoustica. 1960;  10 400-411
  • 22 Siebein G, Crandell C, Gold M. Principles of classroom acoustics. Reverberation.  Educ Aud Mono. 1997;  5 32-43
  • 23 Fitzroy D. Reverberation formula which seems to be more accurate with non-uniform distribution of absorption.  J Acoust Soc Am. 1959;  31 893-897
  • 24 Egan M. Architectural Acoustics. New York; McGraw-Hill 1987
  • 25 Crandell C, Smaldino J, Flexer C. Sound Field FM Amplification: Theory and Practical Applications. San Diego, CA; Singular Press 1995
  • 26 Cooper J, Cutts B. Speech discrimination in noise.  J Speech Hear Res. 1971;  14 332-337
  • 27 French N, Steinberg J. Factors governing the intelligibility of speech sounds.  J Acoust Soc Am. 1947;  19 90-119
  • 28 Miller G. Effects of noise on people.  J Acoust Soc Am. 1974;  56 724-764
  • 29 Miller G, Nicely P. An analysis of perceptual confusions among some English consonants.  J Acoust Soc Am. 1955;  27 338-352
  • 30 Suter A. The ability of mildly hearing impaired individuals to discriminate speech in noise. Aerospace Medical Research Laboratory Report No. AMRL-RT-78-4 OH; Wright Patterson Air Force Base 1978
  • 31 Crandell C. Individual differences in speech recognition ability: implications for hearing aid selection.  Ear Hear. 1991;  12 S100-S108
  • 32 Moore B. An Introduction to the Psychology of Hearing. New York; Academic Press 1991
  • 33 Danaher E, Pickett J. Some masking effects produced by low frequency vowel formants in persons with sensorineural hearing loss.  J Speech Hear Res. 1975;  18 261-271
  • 34 American National Standards Institute .Specification for Sound Level Meters. ANSI S1.4-1983(R1997). New York; American National Standards Institute 1997
  • 35 Beranek L. Acoustics. New York; McGraw-Hill 1954
  • 36 Sutherland L C, Lubman D. Development and challenges of the American National Standards Institute standard for classroom acoustics.  Semin Hear. 2004;  25 167-178
  • 37 Siebein G. Understanding classroom acoustic solutions.  Semin Hear. 2004;  25 xxx
  • 38 Crandell C C, Kreisman B M, Smaldino J J, Kreisman N V. Room acoustics intervention efficacy measures.  Semin Hear. 2004;  25 201-206
  • 39 Berg F. Acoustics and Sound Systems in Schools. San Diego, CA; Singular Publishing 1993

Carl C CrandellPh.D. 

University of Florida

352A Dauer Hall, Gainesville

FL 32611

Email: crandell@csd.ufl.edu

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