A study on annoyance of musical signal using LAeq measurement and digital signal processing

In this paper, about the annoyance of musical signal at concert hall, we describe the preliminary experiment using digital signal processing technique and method of measurement of A-weighted sound pressure level (LAeq). To consider the time variance of musical signal in frequency domain, we adopted digital signal processing technique. Concretely, the musical signal of which duration is 3min 40sec, was analyzed by DFT with every 200ms, and 4096 points FFT operation. Next, measurement of LAeq was used to observe the fluctuation of level of musical signal in time domain. At last, we considered the relationship between this fluctuation and the result of FFT operation. And at the same time, also the same analysis was applied about traffic noise, then we described macroscopic consideration for the physical and psychological difference of musical sound and traffic noise.