Noise spectrum detector

Noise spectrum detector modelMHYZSP

Main functions and features

1. The measurement accuracy of the sound level meter meets the requirementsGB/T3785(IEC61672)2Grade.

2. filterconform toIEC1260 and GB/T3241 for Level 1/1,Requirements for octave band filters.

3. Dynamic range greater than100dB， No range conversion is required during measurement.

4. Can simultaneously perform three types of frequency weighting in parallelA、C、Z， Three types of time measurement weights F, S, and I.

5. Peak value according to the new national standardCpeak sound level measurement peak noise.

6. Can measure and display simultaneously10 measurement indicators, and graphics can also be displayed.

7. can be based on1/1,Calculate the equivalent continuous sound level of each frequency point's sound pressure level over a period of time based on the center frequency point of the octave band filterLeq value.

8. Digital signal processing, wide frequency response range, large dynamic range, and lower background noise.

9. Airport noise can be measured according to standards.

10. It has the function of collecting noise data.

11. Display the time-domain curve of the noise while measuring it.

12. high-capacityMicroSD card (TF card) storage, USB interface and RS232 interface.

13. The instrument has internal components2M capacity FLASH memory.

Noise spectrum detectorMain technical performance

1. Execution standard: GB/T3785-2023 (IEC61672) Level 1 GB/T3241 (IEC61260) Level 1

2 Microphone:Φ 12.7mm (1/2 ") pre polarization test condenser microphone

3 Frequency range:20Hz~12.5kHz

Measurement range: 25dB~132dB (A), 28dB~132dB (C), 30dB~132dB (Z)

5 Dynamic range: greater than 100dB (weighted by A)

6 Frequency Weighting: Parallel (Simultaneous) A, C, Z Weighting

7-time weighting: parallel (simultaneous) fast (F), slow (S), I (pulse), and Cpeak

8 Detector Characteristics: Digital Detection Technology

9 A/D bits: 24 bits; Sampling frequency: 48kHz

10 monitor: 160 x160Dot matrix LCD display withLED backlight.

Level 11 range: divided into high and low levels, with a linear range of ≥ 100dB for each level. High: 32dB~132dB

Low:25dB~112dB LCpeak： 高： 70dB~135dB 低： 55dB~115dB

12. Main display content: It can simultaneously measure and display 10 measurement indicators and the curve of sound pressure level changes over time.

Statistical distribution map, cumulative distribution map24-hour distribution map and calculated values of L1~L99. 1/1 real-time spectrogram.

13 Noise spectrum measurement:The instrument can measure in real-time1/1,Octave filter data, calculate and display each center frequency

The instrument can save and display real-time data on the sound pressure level of the rate point.

14 Measurement time setting: Single group measurement time can be selected as 10s, 1min, 5min, 10min, 15min

20min、30min、1h、8h、24h。 Man (set manually within 24 hours).

15 main measurement indicators: Lxyp, Lxeq, Lxae, Lxmax, Lxmin, LxN, SD, E, DI%.

（X is A, C, Z, Y is F, S, I, N is 5, 10, 50, 90, 95)

16 Airport noiseMeasurement: Airport noise measurement can be conducted and calculatedTd、LEPN、LAmax、LA’max，

The longest measurement time is60 seconds, can manually end the measurement and calculate the results.

17Collecting noise measurement:Calculate and save the instantaneous sound level for a certain period of time, and the measurement time can be manually set

18 Data Storage: Only F1ash can store 3000 sets of single measurement results or 200 sets of hourly measurement results.

Like addingThe SD card storage capacity can be expanded to a maximum of 32GB. It can store more measurement data.

19 Data processing software: Use software to read data and SD card data files for post-processing analysis,

And output the report.

20 Data Export: The instrument F1ash and SD card data can be output through the RS-232 interface, and can also be connected

passThe USB interface reads data files from the SD card.

21 outputs: AC output, RS-232 port, USB port.

22 Power supply: 7.5V (7.4V/2000mAh rechargeable lithium battery) can work continuously for 24 hours (in non spectrum testing mode).

23 Dimensions: 1×b×h（mm） 24067×36

24 Quality: 300g (including battery)

25 working temperature:-10℃~50℃Relative humidity20%~90%