1、 Application scope and characteristics:
1. A, C, and F sound level measurement records.
2. Real time 1/3 and 1/1 octave band spectrum analysis.
3. Linear spectrum display analysis.
4. Transient time-domain waveform recording and analysis.
2、 Main technical parameters and functions:
1. Compliant with standards: GB/3785 Type 1 and GB/3241.
2. Measurement range: (with 2 × 10-5Pa as reference)
3、 25dB~135dB(A)
4. Frequency range: 20Hz to 20kHz
5. Frequency weighting: A, C, F (linear)
6. Detection characteristics: RMS, peak factor ≥ 10 (sound level meter section)
7. Dynamic range: 60 dB
8. Range control: Eight levels of 30-100dB.
9. Sampling rate: 44.1 kHz
10. A/D acquisition card: 16 bits
11. Frequency resolution: 5.38Hz (FFT bandwidth).
12. Filter bandwidth: 1/3, 1/1 octave band.
13. Filter center frequency: 1/3:25-20000Hz, a total of 30 groups; 1/1:31.5~16000Hz, a total of 10 groups.
14. Sound calibration: 94dB, 1000Hz sound level calibrator.
15. Operating temperature: -10 ℃ to+50 ℃
16. Relative humidity: 30% to 90% RH
17. Battery: DC6V, 4 No. 5 alkaline dry batteries.
18. Computer: Pentium 4 processor, with over 128MB of memory, using internal or external A/D acquisition cards.
3、 Other:
1. Select attachments: calibrator, extension cable (10m/15m/30m), tripod, and dedicated AC accessories;
2. Size: (L × B × H) cm (29 × 10.6 × 6.5); Weight approximately: 400 grams;
3. Basic configuration: Sound level meter, A/D acquisition card, communication cable, dedicated software (installation), portable case, hood
