649 Development of all-in-one probe displaying sound intensity vector on measurement field

Sound intensity method is one of the acoustic measurement techniques. Sound intensity means the propagation of sound energy and helps us to figure out sound field. Sound Intensity mapping is general measurement method that measures sound intensity vectors on each measurement points and combines the photograph of measurement field and measured sound intensity vectors. This measurement method has the problem that takes a long time to figure out sound field because of large amount of measurement points. If sound intensity vector is shown on measurement field directly aiming to find out the Noise Source, we figure out sound field quickly and simply. In this paper, all-in-one probe displaying sound intensity vector on measurement field was developed. The sound intensity probe consists of four microphones and the displaying device for sound intensity vector. The displaying device consists of LED array. In this report, the effects of the LED array structure to the measured sound field is investigated experimentally. This report demonstrates sound intensity mapping and noise source identification used the proposed probe.