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.[2]
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Accuracy class 2 to IEC 60651 Easy to adjust (adjustment screwdriver included) Frequency weighting to characteristic A and C Maximum and minimum memory Measure Hz and dB
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)
94dB and 114dB Sound Calibration at 1KHz Accurate and Simple to use Fits 1", 1/2" or 1/4" diameter microphone
Measure % Noise Dose / Exposure Time / Sound Level Real time clock with calendar(1355) RS-232 interface(1355)
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
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
Specifications - Fast, Slow, Impulse, Peak response time. - Frequency range: 20Hz ~16KHz. - Measurement range: 30dB~130dB. Class 1 Integrating Sound Level Meter Comply with IEC-61672-1 2002 Class1 Ideal for the assessment of - Environmental noise. - Noise at workplaces. - Product noise - Fast, Slow, Impulse, Peak response time. - Frequency range: 20Hz ~16KHz. - Measurement range: 30dB~130dB. - Dynamic range:100dB. - A/C/Z frequency. - Data stored up to 32,000 records,auto-mating transfer to micro SD card. - DC & AC Output. - USB interface. - Bargraph display SPECIFICATION: Display 3 1/2 digit backlit LCD display, maximum reading of 2000 Display refresh rate 1 time/ per second Applicable specifications - IEC 61672-1 : 2002 Class1 - ANSI S1.4 Type 1 - CNS NO.7129 Type 1 - JJG-188-2002 Class1 Microphone -/+1/2" pre-polarized condenser microphone build in preamplifier: -26 +/- 2dB (50mV/Pa), frequency range: 20 Hz~20 kHz, heat noise : <28 dB(A) Measurement...
- Statistic analysis. - 24HR measurement. - Integral measurement. - Real time analyzer in 1/1 and 1/3 octave band. - Simultaneously measures A, C, Z and F, S, Impulse. - Measurement function: Lxyp, (Lxyi), Lxeq,1s, Lxeq, T, LAE, E,Cpeak+, Cpeak- , LAFmax, LAFmin, LAFeqT, LASeqT, LAIeqT, Laeq(20Hz~200Hz). - USB Datalogger with 128 records capacity. - Real time clock with calendar. - Sampling Frequency: 20.8us(48KHz). - Wide Frequency range: 10Hz~20KHz. - Wide measurement range: 25dB~140dB. - Wide dynamic range:90 dB. - Fast, Slow, Impulse, PeakC+, PeakC - A /C /Z Frequency weighting. - Optional mini-printer for the analytical result printing. - 5 Languages software (English / Chinese / Spanish / German / Italian) .