Psychoacoustic Parameters and Ear Canal Role
AbstractBackground and objective(s): Effects of different parts of the human ear on the psychoacoustic parameters did not study before So, the purpose of this study was to see that the psychoacoustic parameters could change significantly in the effects of human ear canal and gender had an important role on it or not. Methods: White and sinusoidal noises were used at three levels, including 75, 85, and 95 dB as the stimulus sound pressure levels (SSPLs). The psychoacoustic parameters including loudness, sharpness, roughness and fluctuation strength were measured outside (cavum part of the external ear) and inside the right ear of each participant. The duration for each measurement was 10 seconds. Independent sample t-test and repeated measures ANOVA test were used for the statistical analysis, and the equality of means was rejected at p0.05). For both sinusoidal noise and the white noise in all three studied SSPLs the differences of four studied psychoacoustic parameters between outside and inside of participants ear are not statistically significant (all P values>0.05). Conclusion: It seems that human ear canal did not have any effects on the psychoacoustics parameters so we can say that ear canal does not have any roles in the noise induced annoyance.
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