Proximity detecting apparatus and method based on audio signals

摘要

An apparatus includes at least one processor and at least one memory including computer code. The at least one memory and the computer code are configured with the at least one processor to cause the apparatus to determine at least one impulse response model pulse train from at least one audio signal, and to determine a presence of an object from the at least one impulse model pulse train.

主权项

1. An apparatus comprising:
at least one microphone; at least two speakers; at least one processor; and at least one memory including computer program code, the at least one memory and the computer program code configured, with the at least one processor, to cause the apparatus to: send a first audio signal to a first speaker of said at least two speakers, and a second audio signal to a second speaker of said at least two audio speakers, said first and second audio signals being separate and distinguishable from one another; receive direct and reflected portions of said first and second audio signals from said at least one microphone as input, said direct portions having passed directly from said first speaker and said second speaker to said at least one microphone and said reflected portions having reflected from an object toward said at least one microphone; filter said input to separate a first contribution due to said direct and reflected portions of said first audio signal from a second contribution due to said direct and reflected portions of said second audio signal; analyze said direct and reflected portions of said first audio signal and said direct and reflected portions of said second audio signal to determine a first distance covered by said reflected portion of said first audio signal and a second distance covered by said reflected portion of said second audio signal; and determine from said first and second distances a position of said object relative to said apparatus.