HY104AOrdinary handheld sound level meterMain technical parameters and performance
1Performance level:GB/T3785andIEC616722level.
2Measured evaluation quantity:L_P(Time weighted sound level)、L_max(Large time weighted sound level)
3, transmission sound Tool:HY205type2Grade engineering measurement microphone, nominal diameter12.7 mmFree field type frequency response. The nominal sound pressure sensitivity is50 mV/PaThe nominal sound pressure sensitivity level is-26 dBThe reference value is1 V）.
4Frequency range:20 Hz～16 kHz.
5Frequency weighting:ACalculation rightsCCalculation rights.
6Time weighting:F(fast response).
7Measurement range:ASound level:30 dB～130 dB；CSound level:40 dB～130 dBDivided into three levels of scope:
Low gear:30 dB～90 dB； Middle gear:50 dB～110 dB; High end:70 dB～130 dBHand selected.
8Display:128×64Dot matrix LCD display（LCD）, resolution0.1dB,It has signs such as overload, under range, and low battery voltage alarm.
9Analog output: The output jack is3.5 mmDual channel headphone jack, low load impedance10 kΩ.
——DC logarithmic voltage: The output voltage is related to the logarithm of the measured sound pressure, and the output voltage is independent of the level range. The unit sound pressure output voltage is15 mV/dBThe upper and lower boundaries corresponding to the total range are1950 mVand450 mV.
——AC linear voltage: The output voltage is linearly related to the measured sound pressure, corresponding to the output voltage at the upper boundary of the level range
0.5 V.
10Power supply:4jointR6Type（5The battery can work continuously under reference environmental conditions16h.
11、HY104AOrdinary handheld sound level meterExternal dimensions：long×wide×thick256 mm×74mm×25 mm.
12、 Weight:500 g.
13Operating temperature range: 0℃～40℃.