The SV 971A is a Class 1 Sound Level Meter and Sound Exposure Meter designed for professional acoustic measurements. It features an omnidirectional, pre-polarised microphone, providing a 120 dB range from 17 dBA Leq to 140 dB Peak in a single span. The device maintains IEC 61672-1 linearity from 24–137 dB LAeq over 5 Hz to 20 kHz frequency range, covering acoustics, noise at work regulations, community noise, and environmental sound pressure levels. Built-in A, C, Z, and LF weightings, Fast, Slow, and Impulse time weightings, and IEC 61260-1-compliant octave filters allow this compact instrument to handle both low noise background monitoring and impulsive noise tasks.
Bluetooth® enables remote control and data review, while the 32 GB data logger stores high-rate time histories. The SV 971A provides up to 24 hours of battery life and maintains Class 1 accuracy from –10 °C to +50 °C and 10–90% RH, ensuring reliability in the field. Advanced functions—RT60, STIPA, audio recording, and real-time analysis—are managed by dedicated software and a mobile app. The meter is fully type approved to IEC 61672-1 Class 1. A wide range of accessories and a typical price of €2,500–€4,000 make the SV 971A a comprehensive and versatile solution for acoustic professionals.
A Class 1 Sound Level Meter is a precision instrument that complies with the IEC 61672-1:2013 standard and its European counterparts (such as BS EN 61672-1 and DIN EN 61672-1), ensuring strict performance requirements for linearity, frequency response, and temperature stability. These standards guarantee high accuracy and reliability, making Class 1 meters the preferred choice for professionals who require dependable sound level measurement in environments such as environmental monitoring, workplace safety, and building acoustics.
To keep that performance traceable, the meter should undergo annual ISO 17025-accredited calibration, perform routine field checks with a 94 dB or 114 dB /1 kHz acoustic calibrator whose results and timestamps are stored in the instrument’s log.
Class 1 standards define superior accuracy for demanding noise measurements
Real-time frequency analysis enhances sound measurement versatility.
Mobile connectivity streamlines advanced acoustic assessments.
Adherence to standards and proper calibration ensures reliable results.
Precision and compliance define measurement reliability.
Integrated firmware and software streamline sound data management.
Classroom acoustics are optimized through precise room parameter measurements.
Automatic calibration simplifies preparation and enhances measurement reliability.
Get all the details on the SV 971A’s full range of features, including advanced frequency weightings, LAeq and Peak measurement capabilities, and real-time frequency analysis. Download the product PDF now to see how the SV 971A can streamline your workplace noise evaluations and ensure compliance with health and safety standards.
Compliance with ISO, OSHA, MSHA, and ACGIH guidelines ensures reliable workplace noise assessments.
The SV 971A Class 1 Sound Level Meter meets IEC 61672 and ANSI/ASA S1.4 standards, providing the accuracy required for occupational noise measurements in line with global regulations. Equipped with a noise dose meter, it calculates noise dose and exposure, supporting industrial hygiene professionals in effective noise risk evaluations and hearing loss prevention.
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Compliance with ISO 16283 ensures accurate sound insulation assessments.
The SV 971A supports advanced sound insulation measurements in line with ISO 16283 standards, using new hardware and updated software for precise results. RT60 Reverberation Time and STIPA speech intelligibility assessments are integrated, enabling detailed evaluation of building acoustics. A dedicated mobile app streamlines the measurement process, making the SV 971A a versatile solution for professionals conducting sound insulation and acoustic quality studies.
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Accurate STIPA measurements ensure clear speech transmission in public address systems.
The SV 971A evaluates speech transmission indexes using the STIPA method, providing precise intelligibility assessments for public address systems in diverse environments. A dedicated mobile app streamlines measurement and reporting, while STIPA signals can be played through system loudspeakers or dedicated reference speakers to ensure reliable and repeatable results.
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Type 1 precision and wide measurement range support reliable environmental noise surveys.
The SV 971A complies with IEC 61672 for both Type 1 and Type 2 measurements, delivering the accuracy needed for environmental noise assessments and regulatory compliance. Advanced features such as real-time frequency analysis and mobile app integration enable professionals to conduct comprehensive environmental noise surveys, analyze data efficiently, and meet strict standards for noise monitoring and control.
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Discover the standards behind professional noise measurement.
See how a Class 1 sound level meter meets IEC 61672 accuracy requirements and why it’s essential for precise, compliant measurements.
Watch the video to learn more about Class 1 sound level meters.
Explore the advanced features of the SV 971A.
Find out how this compact, lightweight meter offers a 120 dB dynamic range microphone and Bluetooth® connectivity for mobile app integration.
Watch the video to see the SV 971A in action.
Class 1 Sound Level Meter – SV 971A
Applications
Hardware Features
Sound measurements features
