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.
Setting standard sound level at 94dB and 114dB.According Standard ANSI S1 4-1984 and IEC 942 1988 Class 21/2 inch microphone adapters provided.Low battery indicator. Class 2 Dual Level Calibrator
Accuracy class 2 to IEC 60651 Easy to adjust (adjustment screwdriver included) Frequency weighting to Characteristic A and C Maximum and minimum value memory Built-in tripod knuckle screw (1/4 inch)
IEC 60942:2003 Class1/ANSI S1.40-1984. ● Output sound level : at 94dB and 114dB. ● Frequency : 1KHZ ±1%, Class1, A ● Accuracy : 94±0.3dB 114±0.5dB Specifications ● Sound pressure levels : at 94dB and 114dB. ● For 1/2" condenser microphone calibration. ● Low battery indication. ● Harmonic waves distortion ±3%. ● Output feedback detection. ● Power: 9V battery 006P or IEC6F22 or NEDA 1604 ● Operation environments : 23.0oC ±3oC <85%RH ,850mbar~1050mbar, ≦2000M
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.
Max. & Min. function. Over & Under range indication. 4-digit LCD display with bar graph. Frequency weighting characteristic for 2 times per second. AC signal output. Low battery indication. IEC 651 Type 2 & ANIS S1.4 Type 2.
• Measurement Range : 30 - 130 dB. • Resolution : 0.1 dB. • Weight : 489 g/1.08 LB. • Dimension : 245 x 68 x 45 mm. • Accessories Included : Instruction manual.......................1 PC