Time Selective Response Measurements - Good Practices and uncertainty

摘要

Time Selective Response, TSR, is a frequency response measurement method based on linearly swept sine signals. Because TSR can be used for free field measurements in ordinary rooms and is fast, accurate and relatively insensitive to background noise, it is convenient for measurements of microphone and sound level meter free field responses. However, the methods combination of time and frequency weighting can make it complicated to estimate the uncertainty of the measured response. This paper briefly recollects the method and presents some experience with and guidelines for choosing measurement and weighting parameters and considerations on the associated uncertainty on the results. The results are discussed on the basis of practical measurements at Bruel & Kjaer of microphone and sound level meter free field responses.