25. Aug. 2015
When measuring ambient noise one has to consider the full range of audible frequencies. Figure 1 is an example of a spectrum of ambient noise measured in an office. One might say that this spectrum could be rated with the single value 48 dB, this being the highest Sound Pressure Level (SPL) across the range (at 63 Hz). No single point on the entire spectrum is above 48 dB.
18 October 2017