Patent ID: 8149728

Claim:
A system for evaluating performance of a microphone for long-distance speech recognition in a robot, the system comprising: a reference voice database for storing a voice signal required for performance evaluation of at least two microphones; a measurement value calculator for calculating both attenuation and distortion of the input voice signal at the same time, when the voice signal from the reference voice database is input to a reference microphone and a target microphone from among the at least two microphones; a comparator for comparing a value calculated by the measurement value calculator with a reference value; and a microphone chooser for determining whether to choose the target microphone according to a result of the comparison; wherein a respective preamplifier for each of the microphones is adjusted to have a same value of gain so that an evaluation measure of performance of all the microphones does not depend on a variance in gain of a particular preamplifier, and wherein the microphones are arranged at different distances from the reference microphone; and a reference voice DB generator for generating the reference voice database by determining a distance from a speaker to a reference microphone and the target microphone, and for recording a voice signal according to each microphone.