Sound is a sequence of waves of pressure that propagates through compressible media such as air or water. (Sound can propagate through solids as well, but there are additional modes of propagation). Sound that is perceptible by humans has frequencies from about 20 Hz to 20,000 Hz. In air at standard temperature and pressure, the corresponding wavelengths of sound waves range from 17 m to 17 mm. During propagation, waves can be reflected, refracted, or attenuated by the medium.
Complies with IEC 61672-1 class 2 standard. 31,000 Records Data Logger. Manual Reading Recording Memory(99 points). LCD Recording Readout(99 memory recording). PC Interface. With Windows Software. AC/DC Signal Output. Resolution 0.1 dB.
Conforms with all the essential health and safety standards & requirements set out by the European Directives IEC651 Type 2, ANSI 1.4 Type 2 and GB/T3785 compliant Multifunctional and with 30-130dB wide range and built-in calibration signal of 94dB at 1kHz (sinusoidal) Offers 4 measurement parameters Lp (sound level), Leq (equivalent continuous A sound),Lmax (maximum sound level), LN (percent of all readings over alarm value set)
Key Specifications/Special Features: Measurement Range: 30~130dB 60dB Dynamic Space in Each Range Accuracy: ±1.4dB Time Weighting Fast/Slow Frequency Weighting A/C Max/Min Function
Features: PC interface via Micro USB cable 64000 records datalogger Bargraph indication Auto power off MAX/MIN function Clock display AC/DC signal output IEC 61672-1 class 2 Patented Specifications: Level Range: 30~130dB Accuracy: ±1.4dB (ref 94dB@1KHz) Frequency Weighting: A / C Time Weighting: Fast, Slow Frequency Range: 20Hz to 8KHz Microphone: Electret condenser microphone Auxiliary Outputs: AC/DC Output Battery: 1.5V AAA x 4 Dimensions: 264 x 63 x 29mm Weight: 245g *The specifications are subjects to change without prior notice. Standard Accessories: Battery, operation manual, carrying case, windscreen, 3.5Ø plug, Micro-USB cable, software