de Toro, Miguel Angel Aranda1; Ordoñez, Rodrigo Pizarro2; Hammershøi, Dorte3
1 Acoustics, The Faculty of Engineering and Science (ENG), Aalborg University, VBN2 Department of Electronic Systems, The Faculty of Engineering and Science (ENG), Aalborg University, VBN3 The Faculty of Engineering and Science (TECH), Aalborg University, VBN
Temporary changes in hearing of the subjects were monitored with distortion product otoacoustic emissions (DPOAEs) after control sound exposures in a laboratory. The objectives of the experiment was to investigate whether the +5 dB penalty for impulsiveness used in international standards and legislation correlates to a higher risk of hearing damage. Subjects were exposed to two types of binaural recordings consisting of a continuous broad-band noise-exposure normalized to LEX,8h = 80 dBA and the interaction of the previous stimulus with a noise of impulsive character normalized to LEX,8h = 75 + 5dB penalty = 80 dBA. The results shown that the effects on DPOAE levels from the two stimuli could be compared in terms of their total acoustic energy.
Proceedings of Acoustics 2012 Hong Kong, 2012, p. 383-383