Directional based audio response to an external environment emergency signal

摘要

An audio signal attenuation system and method for detecting an audio emergency warning signal (or alarm) in a vehicle in which an audio signal is being played. Embodiments of the system and method make it easier for a police, fire, or other emergency alarm or siren to be heard in a loud or noisy listening environment when audio signal is being reproduced. This is achieved using selective frequency attenuation, which identifies a frequency of the alarm and then selectively attenuates the alarm frequency in the audio signal. Moreover, direction data that includes information about from which direction the alarm is coming can be used to selectively attenuate the alarm frequency in certain channels (or speakers) of the audio signal. In some embodiments, audio cues are used to alert the listener to the alarm signal and are adjusted based on alarm distance from the vehicle, speed, and the type of alarm.

主权项

1. A method for processing an audio signal, comprising:
selectively attenuating a specific frequency in the audio signal, the specific frequency corresponding to an alarm frequency of an audio emergency warning signal, so that an amplitude of the alarm frequency in the audio signal is attenuated relative to other frequencies in the audio signal; selectively attenuating the alarm frequency for each channel of the audio signal; and attenuating a low-frequency effects channel of the audio signal to allow a listener to hear the audio emergency warning signal.