SM04-เครื่องวัดความดัง Decibel DB 7 Range Sound Level Audio Noise Meter

Product Description

    Characteristics

• Seven sound level ranges - allow measurements from 50 - 126 dB (referenced to 0.0002ubar).

• A and C weightings - lets you check compilance with safety regulations as well as make acoustic analysis.

• Slow and fast response settings - lets you check peak and average noise levels.

• Built-in battery condition indicator.

• Phono-type output jack - for connection to home theatre or test equipment.

    Specifications

Power supply: 1 x 9v Alkaline type 6LR61 Battery (included)

Measure range:

     Switch setting : from 60dB to 120dB

     Range of Measurement: from 50-66dB to  110-126dB

Load Impedance: 10 kohm minimum

Distortion: Less than 2% at 1kHz, 0.5-volt

Microphone: Electret condenser omnidirectional becoming slightly directional with  increase in frequency.

Accuracy: +/- 2dB @ 114dB

Standard: 0dB = 0.0002ubar

Weighting: A and C

Response: Fast and Slow

Signal Output: 1.0 volt(peak) minimum  into open circuit, with full-scale meter deflection at 1kHz

Battery check: Tests "good" from 7.0 to 10.5 volts

Expected Battery Life: 110 working hours (alkaline battery)

Dimensions: 160 x 62 x 44mm

Weight : about 185g