The digital sound level meter – comfort and reliability
With a measurement range of 30 to 130 dB, the sound level meter was developed to meet the technical standards of IEC 61672: Type 2. It enables you to draw reliable conclusions about a variety of sound sources, as well as precisely measuring, recording and analysing them.
The sound meter impresses with a measuring accuracy of ± 1.4 dB. This makes it possible to classify the collected values accurately, whether for road noise or for noise generated by machines. In order to ensure precision, you can preselect one of three measuring ranges: light (30 - 80 dB), medium (50 - 100 dB) and high (80 - 130 dB). If you aren't sure which range is the right one, you can use the automatic range to cover the entire measuring range.
The sound meter effectively recognises a frequency range of 31.5 Hz to 8 kHz, meaning it can also measure frequencies that are not audible to the human ear. The meter has selectable frequency weightings for optimum measurement results: Frequency weighting A is ideal for ambient noises in for example an office, while in frequency weighting C the device registers sound sources originating from machines.
The Fast and Slow functions enable you to better measure and describe the dynamic of the recorded sound sources. In Fast mode, the device measures with a speed of 125 ms, thereby recording rapid changes in sound pressure better than in Slow mode, in which measurements are taken every second to show a more continuous sound level. The maximum recording time depends on the sampling time. At 125 ms, it is a maximum of 9 h. At a sampling rate of 1 s, the maximum recording time is about 72 h.