Sound localisation is the process of determining from which direction a sound originates, and with some experimentation and testing Johnathan Hottell has demonstrated this in action with his Arduino-based prototype. By using three electret microphones that feed the signal back to the Arduino via three amplifiers and a comparator - the Arduino can then rotate the device on a servo to indicate the direction of the sound. This process is explained in detail and demonstrated in the following video:
An interesting experiment, and one that could be useful for robotics, gaming and adding to a nerf-gun shoooter. Either way, check out Johnathan's website for more details including the external circuit schematic and Arduino sketch. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
To test audio sampling yourself you can make an easy start with a simple electret microphone board, and our Freetronics MIC: microphone and sound module is perfect.
The MIC: contains an integrated dual signal amplifier converts the sound to separate channels for pulse / frequency measurement, and sound volume (pressure) level. Designed to connect straight to an Arduino compatible microcontroller, Analog to Digital converter, or many other circuits. For more information and to order click here.