An augmented-reality audio application called LiveEQ is described. It captures the ambient sound around the listener with miniature microphones, equalizes the audio signal, and plays it to the listener with headphones. The user hears a mix of the processed headphone sound and the original sound leaking through the headset. The overall sound pressure level at the listener`s ear can be made smaller than when listening without headphones. The equalization enables modifying the sound spectrum in a desirable way to improve speech intelligibility or music quality in real time.
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