MICROPHONE POSITIONING USING ACOUSTIC LOCATION

Part of the procedure in acoustic measurements is to collect the exact location of the microphone during the measurement. In simple measurement setups that include only one microphone, the coordinates of the microphone can be acquired manually. In contrast, when many microphones are in use or their movement is motorized the precise location has to be taken with an automated method. Such positioning systems most commonly represent an additional part of equipment or en extension of the measurement system. The study presents the use of high frequency loudspeaker drivers with known location to acquire the position of the microphones. The drivers are in a non planar configuration and an impulse response measurement is carried out between each driver and the microphones. The respective distance can be calculated based on the time of arrival of direct sound. A test measurement setup is presented together with the implemented routines.