Abstract
Loudspeakers of guitar amplifiers used by electric guitarists are analyzed in terms of their radiation characteristics. This was performed using an acoustic camera consisting of 128 microphones. The data recorded were digitalized with a sample rate of 48 kHz and analyzed with methods of near field acoustic holography (NAH) and statistical optimized NAH. By these algorithms an acoustic hologram was obtained. The radiation is visualized to get information about the different parts of the complete electric guitar sound box. Differences in sound between different loudspeaker constructions can be explained by taking this close look at the sound coming out of the speakers. The radiation behavior, the impulse behavior, and the diffraction of sound coming from the backside of the speaker are investigated in this way. So the amount of diffraction of sound influencing the overall character of the speaker is also addressed.
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