Calibration of headphones to improve accuracy of recorded audio content

摘要

User headphones are calibrated in real time to improve the reproduction accuracy of recorded audio content. Microphones of a type used to record the audio content (including their orientation and recording characteristics) are characterized to indicate a first audio coloration. Audio playback devices of a type used to process the audio content are characterized to indicate a second audio coloration. Headphones of a type corresponding to the user headphones are characterized to indicate a third audio coloration. An equalization signal is computed based on the audio colorations, and is applied to calibrate the user headphones during playback of the audio content. A database of the characterizations is maintained so that calibration of different models of headphones using different playback devices can be accomplished for audio content recorded using different models of microphones.

主权项

1. A method for calibrating user headphones to improve the accuracy of recorded audio content reproduced thereon, comprising:
determining characterizing of reference microphones of a type used to record said audio content to indicate a first audio coloration caused by the microphones when located proximate to a listener's ears; determining characteristics of said microphones to indicate a second audio coloration caused thereby when located proximate to the ears of a dummy head; determining characteristics of reference headphones of a type corresponding to said user headphones to indicate a third audio coloration caused by the reference headphones when used to reproduce audio content; computing an equalization signal ΔE based on the first, second and third audio colorations; and applying the equalization signal to calibrate said user headphones during playback of audio content that was recorded using microphones of a type corresponding to said reference microphones.