Audio headset with automatic equalization

摘要

An accessory having an earbud for insertion into a user's ear is disclosed. The earbud may include a speaker and a microphone in which the speaker plays an audio signal for the user and the microphone receives the audio signal. The accessory includes a processor that is coupled to the speaker and the microphone to execute various operations. For example, the operations may include: determining a ratio of an energy estimation of the speaker audio signal to an energy estimation of the audio signal received by the microphone; determining a gain for the speaker audio signal based upon the ratio; based upon the gain, selecting a shelving filter; and applying the shelving filter to the speaker audio signal.

主权项

1. An audio system comprising:
an earbud configured for insertion into a user's ear, the earbud including a speaker and a microphone, wherein the speaker is configured to receive and play an audio speaker signal for the user and the microphone is configured to output an audio microphone signal; and a processor coupled to the speaker and the microphone to determine a ratio of (1) an energy estimation of the audio speaker signal to (2) an energy estimation of the audio microphone signal, at low frequencies, determine a ratio of (1) an energy estimation of the audio speaker signal to (2) an energy estimation of the audio microphone signal, at high frequencies, wherein the high frequencies are within 1 kHz to 10 kHz, determine a gain based upon both the ratio at low frequencies and the ratio at high frequencies, based upon the gain, select a shelving filter, and apply the shelving filter to the audio speaker signal.