Sound meter

The model is the world’s first 0-dB function sound meter available.
It is designed to meet Type 2 standards for ANSI S1.4 1983 and IEC 61672-1.
Measures Lp, Leq, Le, Lmax, Lmin and Lx.
28 to 130 dB measurement range.



The new sound level meter is designed to be compact, lightweight and easy to use.

This technology extends the lower limit of the measurement range to lower than 0 dB-SPL.

It complies with the type 2 ANSI S1.4 1983 standard , and has an innovative, unique 0-dB feature that eliminates the selfnoise of the microphone.

WeightingA, C and Z (FLAT)
RangesA: 28 to 130 dB (0 to 80 BD if 0dB function is active for 4431-1G).
C: 36 to 130 dB.
Z (FLAT): 40 to 130 dB.
C peak: 55 to 141 dB.
Z (FLAT) peak: 60 to 141 dB.
Time WeightingFast, Slow, Impulse
ParametersSound pressure level(Lp).
A-weighted sound pressure level(LA).
C-weighted sound pressure level(LC).
Equivalent continuous A-weighted sound pressure level(LAeq).
Sound Exposure level(LAE).
Maximum sound pressure level(LAmax).
Minimum sound pressure level(LAmin).
Percentile sound pressure level(5 freely selectable values LAN).
Peak Sound Pressure level(Lpeak).
C- weighted Peak Sound Pressure level(LCpeak).
Power average of maximum sound pressure level in a given interval(LAtm5).
Impulse Sound pressure level(LAI).
Impulse equivalent continuous sound pressure level(LAIeq).
StandardsANSI S1.4 1983: Type 2
IEC 61672-1: Class 2
InterfaceUSB, Printer
Output1 Vrms (AC output)
2.5 V (DC output)
Warranty1 year
Standard AccessoriesOperation manual, SD card for data storage, Windshield,Carrying case, AA batteries, Hand strap, Calibration certificate
DimensionsW 3.4″ x H 12.9″ x D 1.9″
Weight1 lb (453g)

Lightweight and compact design.
28 to 130 dB measurement range.
A, C, and F weighting modes.
Measures Lp, Leq, Le, Lmax, Lmin and Lx.
Equipped with highly sensitive electret condenser microphone.
Large 4 digit display with 0.1 dB resolution with backlighting and analog bar graph.
Add additional functions with the program cards.
Includes SD card for data storage, windshield, carrying case, AA batteries, hand strap, and calibration certificate.
Power supply4 AA Batteries or AC adapter
Operating Environment14 to 122°F (-10 to 50°C), 30 to 90%RH with no condensation
Industrial Hygiene Investigation
Noise Exposure Measurement
Environmental Noise Measurement
Microphone with PreAMP(20 to 10,000dB)
Microphone without PreAMP(20 to 10,000dB)
Weatherproof Screen with TripodΦ200
Weatherproof Screen without TripodΦ200
AC Adapter – AC 100 V Input. DC 6 V Output
Tripod EX630, Made by Velbon Corporation
Microphone Cable3m
Extension Cable5m
Extension Cable10m
Extension Cable20m
Extension Cable30m
Extension Cable with Reel50m
Extension Cable with Reel100m
Extension Cable with Reel200m


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