/**
         * Max time shift between right and left mic in number of samples.
         * This typically depends on the sample rate and the distance between
         * microphones. <br/>
         * You have max_samples_shifts=(dist_between_mic/speed_of_sound) * sample_rate
         */
        int _nbSamplesMaxDiff;

        /**
         * sound speed in meters per seconds
         */
        static const float _soundSpeed = 344;

        /**
         * Distance between microphones in meters
         * for PS3 eye: http://www.rrfx.net/2009/11/ps3-eye-4-channel-audio-tests-on-ubuntu.html
         */
        static const float _distanceBetweenMicrophones = 0.062f;

SoundSourceLoc() {
                ....
                // compute extreme sample diff
                _nbSamplesMaxDiff = (_distanceBetweenMicrophones/_soundSpeed)*_soundSamplingRate+1;
        }