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- Title
VARIATIONS IN THE ACOUSTIC MEASUREMENT OF EARBUD EARPHONES IN AN ANECHOIC CHAMBER DUE TO CHANGES IN THE EARPHONE PLACEMENT IN EAR CONCHA.
- Authors
Pawar, S. J.; Liu, Y. C.; Huang, Jin H.
- Abstract
The growth of consumer electronic products is encouraged by innovations and has stimulated the persistent development of earphones for high-quality sound reproduction. Earbud earphone is located in the concha of the human ear facing an ear-canal. The placement of earphones in the concha plays a remarkable role in the sound pressure level response of an earphone. In this study, ten earphones were tested for frequency response and total harmonic distortion using head and torso simulator in an anechoic chamber. Three positions and two orientations of earphones in the concha were identified for measurement. Based on the responses of all earphones at all orientations and positions, it is concluded that there is a variation in the frequency response and total harmonic distortion. Even though the variation is small in magnitude, its effect on sound perception, sound exposure, and the hearing threshold is phenomenal. Based on the proposition presented in this work and the safe daily sound exposure, it has been determined that the variation in the frequency response affects the perceived loudness of sound and can cause significant differences in the daily sound exposure limit for a human being.
- Subjects
HOUSEHOLD electronics industry; HEADPHONES; SOUND recording &; reproducing; SOUNDS; ANECHOIC chambers
- Publication
Canadian Acoustics, 2020, Vol 48, Issue 4, p29
- ISSN
0711-6659
- Publication type
Article