· Sound Adaptor Converts your DMM into a Sound
  Level Meter
· Accuracy: From +/- 1.5dB
· Frequency: 31.5Hz to 8Khz
· A Frequency Weighting
· Sound Meter Range: 30dB ~ 130dB

Specifications

Measurement/Range 30dB to 130dB, 3 ranges
Range 1: 30 to 80 dB
Range 2: 50 to 100 dB
Range 3: 80 to 130 dB
Output 1 mV per 1 dB
Accuracy
(23 ± 5°C) Frequency weighting meet IEC 651 type 2, calibrating input signal on 94 dB(31.5Hz to 8 kHz), then the accuracy of A weighting is specified as following:.
31.5Hz ~ ± 3dB, 63Hz ~ ± 2dB, 125Hz ~ ± 1.5dB,
250Hz ~ ± 1.5dB, 500Hz ~ ± 1.5dB, 1kHz ~ ± 1.5dB, 2kHz ~ ± 2dB,
4kHz ~ ± 3dB, 8kHz ~ ± 5dB
Frequency Weighting Network Characteristics of A weighting
A weighting: The characteristic is simulated as "Human Ear Listening" response.
Frequency 31.5 Hz ~ 8,000 Hz
SL-406 Factory Calibration Source B & K (Bruel & Kjaer): Multi-function acoustic calibrator, model: 4226
Microphone Type Electric condenser microphone
Microphone Size 0.5" standard size
Calibration VR Build in external calibration. VR.
Battery DC 9V battery (006P, 6F22)
Power Consumption Approx. DC 4mA
Operating Temperature 0°C ~ 50°C (32°F to 122°F)
Operating Humidity Less than 80% RH
Weight 150g/0.33 LB (including battery)
Dimension Main Instrument:
107 x 53 x 29mm (4.2 x 2.1 x 1.1 inch)

Probe:
Dia. 12.7mm x 70mm (Dia. 0.5 inch x 2.76 inch)
   
Accessories Included Operation Manual
Optional Calibrator
94dB Sound Calibrator, model: SC-941
94/114 dB Sound Calibrator, model: SC-942