AcSoft
Svantek UK

SV 971A Compact Sound Level Meter

The new SV 971A Class 1 Sound Level Meter has been designed for both occupational noise and building acoustics measurements.

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The meter has been equipped with a new measuring microphone offering a LAeq linear measurement range from 27 to 137 dB (140 dB Peak) in a single range! The microphone’s improved design ensures even better long-term stability of microphone sensitivity. The SV 971A uses the new low-power Bluetooth® interface allowing current results to be previewed on a smartphone or tablet as well as controlling measurement Start / Stop. The Assistant application also signals an alarm when set noise limits are exceeded. Along with the new hardware additions, the SV 971A has been equipped with a new internal program that supports the reverberation time RT 60 measurement and STIPA speech intelligibility measurements, both supported by a mobile application.

SV 971A Specifications

Standards Class 1: IEC 61672-1:2013, Class 1: IEC 61260-1:2014
Weighting Filters A, B, C, Z, LF
Time Constants Slow, Fast, Impulse
RMS Detector Digital True RMS detector with Peak detection, resolution 0.1 dB
Microphone ACO SV 7152, 32 mV/Pa, prepolarised 1/2” condenser microphone
Preamplifier SV 18A detachable (60 UNS thread)
NORMAL
Linear Operating Range
Dynamic Range
27 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672)
20 dBA RMS ÷ 140 dBA Peak (typical from noise floor to the maximum level)
LOW
Linear Operating Range
Dynamic Range
24 dBA RMS ÷ 126 dBA Peak (in accordance to IEC 61672) in a single range
17 dBA RMS ÷ 126 dBA Peak (typical from noise floor to the maximum level)
Internal Noise Level
(acoustical compensated)
20 dBA RMS in the range NORMAL
17 dBA RMS in the range LOW
Dynamic Range 120 dB
Frequency Range l5 Hz ÷ 20 kHz (+/- 3 dB)
Sound Level Meter Results Elapsed time, Lxy (SPL), Lxeq (LEQ), Lxpeak (PEAK), Lxymax (MAX), Lxymin (MIN),
where x – weighting filter A/ B/ C/ Z; y – time constant Fast/ Slow/ Impulse
LR (ROLLING LEQ OPTION), Ovl (OVERLOAD), Lxye (SEL), LN (LEQ STATISTICS),
Lden, LEPd, Ltm3, Ltm5
Sound Exposure Meter
Results
Lxy (SPL), Lxeq (LEQ), Lxpeak (PEAK), Lxymax (MAX), Lxymin (MIN), DOSE, (optional)
DOSE_8h, PrDOSE, LAV, Lxye (optional)
(SEL), Lxye8 (SEL8), PLxye, (PSEL), E, E_8h, LEPd, PTC (PEAK COUNTER),
PTP (PEAK THRESHOLD %), ULT (UPPER LIMIT TIME), TWA, PrTWA, Lc-a
Exchange Rate 2, 3, 4, 5, 6
Measurement Profiles Simultaneous measurement in three profiles with independent set of filters (x) and detectors (y)
Statistics Ln (L1-L99), complete histogram in meter mode
Data Logger Time-history logging of summary results, spectra with two adjustable logging
steps down to 100 ms and down to 2 ms in the RT 60 mode
1/1 Octave Analysis (option) Real-time analysis meeting Class 1 requirements of IEC 61260, centre frequencies from 16 Hz to 16 kHz
1/3 Octave Analysis (option) Real-time analysis meeting Class 1 requirements of IEC 61260, centre frequencies from 8 Hz to 20 kHz
Audio Recording (option) Audio recording on trigger or continuous mode, 12 / 24 / 48 kHz sampling rate, wav format
Voice Comments Audio records on demand, created before or after measurement, added to measurement file
Memory MicroSD card 32 GB (removable & upgradeable up to 128 GB)
Display Colour 96 x 96 pixels OLED type
Keyboard 8 push buttons
Communication Interfaces USB 2.0, Bluetooth® 4.2
SV 76 – RS 232 cable with external power supply connector (optional)
Power Supply Four AAA alkaline or rechargeable NiMH batteries (not included)
Operation time 16 h ÷ 24 h (depending on configuration and environmental conditions)
USB interface 100 mA HUB
Environmental Conditions Temperature from -10 °C to 50 °C (14 °F to 122 °F)
Humidity up to 95 % RH, non-condensed
Dimensions 232.5 mm x 56 x 20 mm (including microphone and preamplifier)
Weight Approx. 225 grams with batteries (Approx. 8.20 oz)

*Continuous product development and innovation are the policy of our company. Therefore, we reserve the right to change the specifications without prior notice

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Applications

SV 971A

The new SV 971A Class 1 Sound Level Meter has been designed for both occupational noise and building acoustics measurements

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