Today various acoustic measurement methods are used to investigate rooms or devices under test. For room-acoustic measurements MLS routines are often applied to obtain the detailed data according to ISO standard 3382. Instead of MLS, nowadays the dual-channel FFT method based on a sweep stimulus is commonly accepted, too. On the other hand, excitation by continuous noise or shot noise is used to obtain a good overview in a short time. For loudspeaker data acquisition or commissioning tests in noisy environments a TDS sweep measurement is performed to achieve results of high accuracy. Here a new measurement tool will be presented, incorporating all of these widely known methods. The advantages and disadvantages as well as the limitations will be discussed for each technique by means of specific examples and measuring applications. A detailed comparison will be provided and recommendations for the practical use under selected acoustic environmental conditions will be given.
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