Compact Class 1 Sound Level Meter for Professional Noise Measurement
The SV 971A Class 1 Sound Level Meter is a compact, pocket-sized instrument designed for occupational noise, building acoustics and general acoustic measurements.
It combines Class 1 sound level measurement with a small, lightweight body, making it suitable for professionals who need accurate results in a portable format. The instrument is designed for use in sound level measurements, noise at work assessments, building acoustics testing and acoustic consultancy surveys.
Designed for Occupational Noise and Building Acoustics
The SV 971A has been developed for both workplace noise and building acoustics applications. It can support a wide range of measurement tasks, including:
- Occupational noise measurements
- Sound exposure measurements
- Building acoustics measurements
- Reverberation time RT60 measurements
- STIPA speech intelligibility measurements
- 1/1 octave and 1/3 octave real-time frequency analysis
- Short-period environmental noise measurements
- General acoustic noise measurements
This makes the SV 971A a practical option for health and safety professionals, acoustic consultants, technical engineers and teams responsible for noise assessment.
Class 1 Accuracy in a Compact Instrument
The SV 971A meets Class 1 requirements for IEC 61672-1:2013 and IEC 61260-1:2014. It uses an ACO SV 7152 prepolarised 1/2” condenser microphone and SV 18A detachable preamplifier.
Key measurement features include:
- Class 1 sound level meter performance
- A, B, C, Z and LF weighting filters
- Slow, Fast and Impulse time constants
- Digital True RMS detector with Peak detection
- 0.1 dB resolution
- Frequency range from 5 Hz to 20 kHz
- Up to 120 dB dynamic range
The instrument is designed to provide accurate noise measurement in a highly portable format.
Wide Measurement Range with New Microphone
The SV 971A is equipped with a measuring microphone offering an LAeq linear measurement range from 27 to 137 dB, with 140 dB Peak, in a single range.
The improved microphone design also supports long-term stability of microphone sensitivity.
Measurement range highlights include:
- Normal range: 24 dBA RMS to 140 dBA Peak
- Low range: 24 dBA RMS to 126 dBA Peak
- Typical range from noise floor: 20 dBA RMS to 140 dBA Peak in Normal range
- Internal noise level: 20 dBA RMS in Normal range
- Internal noise level: 17 dBA RMS in Low range
For very low noise level measurements, the additional Low range is also available.
Remote Control with Bluetooth and Mobile Applications
The SV 971A uses a low-power Bluetooth interface, allowing current results to be previewed on a smartphone or tablet. Measurements can also be controlled remotely using Start and Stop functionality.
Depending on the application, the SV 971A can be used with mobile tools such as the Assistant application or Building Acoustics PRO application.
This supports:
- Remote result preview
- Start and Stop measurement control
- Alarm signalling when preset noise limits are exceeded
- Building acoustics workflows from a smartphone or tablet
This is particularly useful when the instrument needs to be positioned away from the person taking measurements.
Building Acoustics, RT60 and STIPA Support
The SV 971A includes support for building acoustics measurements and can be used with the Building Acoustics PRO application.
The instrument supports licensed functions reverberation time RT60 measurement and STIPA speech intelligibility measurement. Frequency analysis can be carried out using 1/1 octave or 1/3 octave spectra, depending on the application.
Building acoustics features include:
- RT60 reverberation time measurement
- STIPA speech intelligibility measurement
- 1/1 octave real-time analysis
- 1/3 octave real-time analysis
- Sound insulation measurement support
- ISO 16283 building acoustics workflows through the mobile application
Reports can be created in line with ISO requirements when using the relevant building acoustics workflow.
Time-History Logging and Audio Recording
The SV 971A supports time-history logging of results such as Leq, Max, Min and Peak. Data is stored on a removable 32 GB microSD card, which can be upgraded to 128 GB.
The instrument can also support audio recording, either on trigger or in continuous mode, with WAV file output.
Data and recording features include:
- Time-history logging
- Two adjustable logging steps
- Logging steps down to 100 ms
- Logging down to 2 ms in RT60 mode
- Audio recording on trigger or continuous mode
- Voice comments added before or after measurement
- WAV audio file support
- USB 2.0 data transfer
These features help users review measurements, document findings and carry out further analysis using PC software.
Software for Data Review and Reporting
The SV 971A can be used with Svantek software for downloading, viewing, post-processing and reporting measurement data.
Supported software includes:
- Supervisor software for data download, instrument configuration and occupational noise exposure assessment
- SvanPC++ for advanced data download, visualisation, post-processing, analysis and reporting
- SvanPC++ Building Acoustics module for more detailed building acoustics calculations
This gives users a clear workflow from measurement capture through to reporting.
Portable, Lightweight and Built for Field Use
The SV 971A has been designed as a compact sound level meter for use in the field. Its small size and low weight make it convenient for handheld measurement work.
Practical design features include:
- Approx. 225g weight with batteries
- Dimensions of 232.5mm x 56mm x 20mm including microphone and preamplifier
- Colour 96 x 96 OLED display
- Eight-button keyboard
- Four AAA battery power supply
- 16 to 24 hours operation time depending on configuration and conditions
- USB interface power option
- Operating temperature from -10°C to 50°C
- Humidity tolerance up to 95% RH, non-condensed
The compact design makes the SV 971A suitable for site visits, workplace assessments, building acoustics testing and general acoustic surveys.
Calibration and Measurement Confidence
The SV 971A can be field calibrated using a sound calibrator. The instrument also supports automatic calibration when a compatible calibrator with auto-run functionality is placed on the microphone.
Calibration features include:
- Calibration by measurement
- Last calibration record
- Calibration history
- Post-measurement calibration information
- Automatic calibration support
- Recommended factory calibration interval of 12 months
This helps users maintain confidence in their measurements and supports consistent professional use.
Optional Functions and Accessories
The SV 971A can be expanded with optional functions and accessories depending on the measurement task.
Available options and accessories include:
- 1/1 octave analysis
- 1/3 octave analysis
- Reverberation time RT60 option
- STIPA option
- Noise dosimetry option
- Audio events recording option
- SV 36 Class 1 acoustic calibrator
- SA 271A outdoor microphone kit
- SC 91A microphone extension cable
- SA 72 waterproof carrying case
Optional functions can be activated using an unlock code when required.
Why Choose the SV 971A Class 1 Sound Level Meter?
The SV 971A combines Class 1 sound level measurement, wide dynamic range, Bluetooth connectivity, time-history logging and building acoustics functionality in a compact handheld instrument.
It is suitable for professionals who need a portable sound level meter for occupational noise, sound exposure, building acoustics, RT60, STIPA and general acoustic measurement work.
Request a Quote or Buy Online
For more information about the SV 971A Class 1 Sound Level Meter, contact the AcSoft team today. You can request a quote, discuss your measurement requirements or buy online.
