References
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- Blue I.V. Positive venting valve concept. Hearing Dealer 1972; 23: 23
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- Lybarger S.F. Earmolds; in Katz Handbook of clinical audiology. Williams & Wilkins, Baltimore 1972
- Lybarger S.F. Personal commun. 1973
- McDonald F.D., Studebaker G.A. Earmold alteration effects as measured in the human auditory meatus. J. acoust. Soc. Amer. 1970; 48: 1366–1373
- Peterson A.P.G., Gross E.E. Handbook of noise measurement. General Radio Company, Concord 1972
- Starke C. About acoustic measurements of earmolds. J. Audiol. Tech. 1971; 10: 142–158
- Studebaker G.A., Zachman T.A. Investigation of the acoustics of earmold vents. J. acoust. Soc. Amer. 1970; 47: 1107–1115