Low noise sound level meter Larson Davis SoundAdvisor™ 831C-LOWN

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Model	831C-LOWN
Manufacturer	Brand LARSON DAVIS (a part of the PCB PIEZOTRONICS)
Power supply	Battery 4-AA (LR6) NiMH / 1,5 V Lithium / Alkaline
Weight	N/A
Size	N/A
Condition	Stocking
Warranty	12 months

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Specifications
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Because Low noise sound level meter Larson Davis SoundAdvisor™ 831C-LOWN consists of the popular SoundAdvisor™ Model 831C paired with the 378A04 low-noise microphone, it can be used with the wide range of 831C accessories.

For example, use with the DVX012 Ethernet dongle to provide network connectivity or the SoundAdvisor™ Portable Noise Monitoring System Model NMS044 to create a low-noise portable monitoring solution.

I. Specification of Sound meter Larson Davis SoundAdvisor™ 831C-LOWN

6 dB A-WEIGHTED NOISE FLOOR

Easily measure very quiet sounds using the SoundAdvisor™ Sound Meter Model 831C paired with the Model 378A04 Low Noise Microphone and Preamplifier. Due to the innovative design of the 378A04, which uses a prepolarized microphone and ICP® (constant current) interface, the combination produces a highly portable system that is battery-powered and intuitive to use.

Low-noise-sound-level-meter-larson-davis-soundadvisor-831c-lown

Expanding the capabilities of the SoundAdvisor™, Noise sound meter Larson Davis SoundAdvisor™ 831C-LOWN configuration is ideal for measurements where noise levels are extremely low, such as very quiet soundscapes and quiet machines.

10 Hz to 16 kHz frequency range
Highly portable
Low power (4 mA ICP)
Single channel
No external power supply required.

APPLICATION OF Low noise sound level meter SoundAdvisor™ 831C-LOWN

Product testing
Environmental noise
Research and development
Anechoic chamber testing.

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Technical specifications of Low noise sound level meter Larson Davis SoundAdvisor™ 831C-LOWN

831C-LOWN SPECIFICATIONS
Calibration	Requires 94 dB re 20 μPa calibrator such as CAL200
Self-generated Noise (typical)
Weighting	0 dB Gain
A	5.5 dB
C	10 dB
Z	18 dB
Alkaline Battery Life	Decreased approx 15% when using 378A04
831C-LOWN Included Items
831C	Model 831C Sound Level Meter
831C-ACC	Accessory kit for Model 831C
ADP074	Adapter for ICP® input (BNC)
378A04	Low noise ICP® microphone and preamplifier
012A10	BNC cable, 10 ft (3 m)
BNC M-M	BNC male to male connector
ADP032	Adapter to mount ½ inch preamplifier to tripod (1/4-20 thread)
Ordering Information
831C-LOWN	Low noise system including Model 831C, 378A04 low noise microphone & preamplifier and accessories
Optional Accessories
CAL200	Class 1 acoustic calibrator, 94 or 114 dB at 1 kHz (The 378A04 must be calibrated at 94dB)
PRM831-FF	PRM831 preamplifier with free field microphone (377B02)
PRM831-RI	PRM831 preamplifier with random microphone (377B20)
TRP001	Tripod with ADP032 for mounting ½ inch preamplifier
Software
SWW-DNA	Software and USB dongle for evaluation and reporting
SWW-DNA-831	Instrument driver for SWW-DNA to provide control, live display, and data translation from Model 831

378A04 SPECIFICATIONS
Acoustic
Sensitivity	450 mV/Pa -7 (±2 dB) re 1 V/Pa
Frequency Range	10 to 16,000 Hz
Inherent Noise	< 6.5 (5.5 typical) dB re 20 μPa
3% Distortion Limit	Level (dB re 20 μPa)	Frequency
	100 dB	< 5 kHz
	80 dB	> 5 kHz
Environmental
Operating Temperature	14 °F to 176 °F (- 10 °C to 80 °C)
Operating Humidity	0 to 99% relative humidity, non-condensing
Electrical
Polarization	0 V
Output Voltage	± 2 V peak maximum
ICP constant current	4 to 20 mA (4 mA supplied by Model 831C)
Physical
Diameter with Grid	0.52 in (13.2 mm)
Height with Grid	4.02 in (102.1 mm)
Equalization Vent	Rear
Weight	1.8 oz (51.3 grams)
Maximum Sound Pressure	130 dB re 20 μPa peak
Mechanical	Grid cap and microphone not removable