Sound Level Meter Class 2

NEEDISS [OEM BRAND] Model NDSM 309

Sound Level Meter Class 2 for environmental noise measurment

● Basic noise measurement
● Environmental noise assessment
● Product quality check
● Evaluation of noise reduction engineering

Standard IEC 61672-1:2013, ANSI S1.4-1983, ANSI S1.43-1997
Octave1 Real-time 1/1 Octave (Option): 20 Hz~8 kHz Real-time 1/3 Octave (Option): 20 Hz~12.5 kHz
Supplied Microphone MPA309T: 1/2” prepolarized measurement microphone, Class 2. Sensitivity: 40 mV/Pa.
Frequency Range: 20 Hz~12.5 kHz.
Mic Interface TNC connecter with ICCP power supply (4 mA)
Detector / Filter Fully float-point digital signal processing (digital detector and filter）
Integral Period Infinite or 1s~24h user define integral period. Repeat time: Infinite or 1~9999
Logger Step 0.1s, 0.2s, 0.5s, 1s~24h (Optional function)
Measurement Functions LXY(SPL), LXeq, LXeq1s, LXIeq, LXYSD, LXSEL, LXE, LXYmax, LXYmin, LXPeak, LDay, LEvening, LNight, Ldn, Lden, LXYN. Where X is the frequency weighting: A, B, C, Z; Y is time weighting: F, S, I; N is the statistical percentage: 1~99.3 profile and 14 custom define measurement are calculate in parallel with different frequency/time weighting.
(All above are optional functions, except for LXY(SPL), LXeq, LXYmax, LXYmin, LXPeak)
24h Measurement Automatic measurement based on user define date/time and save the history data

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