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Class 1 Sound Level Meter

SV 971A

The SV 971A is a Class 1 Sound Level Meter and Sound Exposure Meter designed for professional use, recognized for its compact size, lightweight, and inclusion of advanced features like a new microphone with a large dynamic range of 120 dB and low-power Bluetooth® connectivity for mobile application integration. The 971 series offers a wide LAeq measurement range (24 to 137 dB linear measurement range, with a Peak of 140 dB) in a single range, ensuring accuracy and ease of use for professionals in the field. Additionally, the device adds new features like RT 60 and STIPA measurements for reverberation time and speech intelligibility, supported by a separate mobile application.

Additionally, it includes a range of options and accessories to extend its capabilities, along with software support for comprehensive noise level analysis and reporting, catering to health and safety specialists’ needs. The SV 971A is equipped to handle a broad spectrum of noise measurement tasks, making it suitable for occupational noise measurements and basic environmental measurements, real-time frequency analysis, audio recording, and time-history logging, all within a device that emphasizes power efficiency and user convenience.

What is a Class 1 Sound Level Meter?

A Class 1 (or Type 1) Sound Level Meter is defined as a measuring device that conforms to the International Electrotechnical Commission (IEC) standard IEC 61672-1:2013, as well as its European equivalents (BS EN 61672-1:2003 in the UK and DIN EN 61672-1:2014 in Germany). These standards outline specific performance criteria that the decibel meter must meet, including a defined linear operating range, frequency response, and the ability to operate accurately across a specified temperature range. These criteria ensure the device’s precision and reliability for measuring sound levels in various professional applications, making it suitable for use in environments where accurate sound level measurement is critical.

class 1 sound level meter
Class 1 SLM
sound level meter app
Mobile App
iec 61672 sound level meter
IEC 61672

Sound Meter PDF


Type 1 Noise Meter designed for Occupational Noise

The SV 971A, a Type 1 noise meter, offers a comprehensive suite of features needed for occupational noise exposure assessment. It is equipped with all necessary frequency weightings (A, C, Z, and more) to accurately assess noise measurement parameters such as measurement of LAeq and Peak sound in the workplace. This capability ensures the meter meets the stringent requirements for occupational health and safety assessments, facilitating easier and faster noise evaluations. Additionally, its integration with real-time frequency analysis and connectivity options for data management further enhances its utility in a professional setting.
971a svantek catalogue hs

Professional Meter for Building Acoustics

The professional meter, designed for building acoustic applications, embodies features that elevate sound insulation measurement efficiency in compliance with international standards. It offers precision in capturing and analyzing sound data relevant to building materials' sound insulation properties. Key features include its ability to conduct detailed frequency analysis, support for RT60 reverberation time measurements, and compatibility with various acoustic standards. These capabilities ensure that professionals can accurately assess the acoustic performance of buildings, facilitating the design and implementation of effective sound insulation solutions.
971a svantek catalogue ba

Sound Level Meter and Analyser



Choosing the Right Sound Level Meter

Understanding Measurement Standards

Measurement standards like ISO, OSHA, MSHA, or ACGIH dictate the specifications required for sound level meters based on the International Electrotechnical Commission (IEC) or the American National Standards Institute (ANSI) standards, distinguishing between Class 1 and Class 2 meters. By understanding these measurement standards, one can determine the necessary instrument specifications for their specific application. The SV 971A, compliant with both IEC and ANSI standards for Class 1, inherently meets and exceeds the requirements for Class 2 meters due to its higher precision and wider operational capabilities. This versatility makes it a suitable choice for a broad range of applications, from occupational noise measurement to environmental noise assessment, adhering to the diverse requirements set by the aforementioned measurement standards.
SV971A Class 1 Sound Level Meter

Octave Band Sound Level Meter

Sound frequency analysis in 1/1 and 1/3 octave bands filters

An Octave Band Sound Level Meter, such as the SV 971A, is designed to analyze sound frequencies in real-time across 1/1 and 1/3 octave bands, fulfilling the IEC 61672 performance standards. This capability allows for detailed frequency analysis, which is essential in various acoustic studies and noise control applications. Beyond its octave band analysis features, the SV 971A also offers additional functionalities like the ability to measure and log data over selectable periods and record high-quality WAV audio files. These features make it a versatile tool for comprehensive sound analysis, catering to a wide range of professional needs.
SV971A Class 1 Noise Level Meter

Sound Level Meter App

Enhancing Acoustic Measurements

The Sound Level Meter App is a mobile application designed to enhance the functionality of a sound level meter by serving as an extension of the meter's user interface. Through a connection with the sound level meter, this app allows users to perform calculations for sound insulation in accordance with ISO 16283, providing both visual results and detailed reports that meet ISO requirements. Additionally, the app includes support for STIPA measurements, further expanding its utility in assessing speech intelligibility. This integration ensures a more user-friendly experience, enabling efficient and accurate acoustic evaluations directly from a smartphone or tablet.
SV971A IEC 61672 Sound Level Meter

Accurate Noise Level Measurement

Standards, Parameters, and Calibration

To accurately measure noise levels, adherence to specific measurement standards and consideration of crucial parameters are essential. For workplace noise evaluations, follow guidelines outlined in ISO 9612, OSHA, MSHA, or ACGIH. Sound insulation should be measured in accordance with ISO 16283, while speech transmission indexes for public address systems must align with IEC 60268 standards. Prior to conducting measurements, it is important to select the appropriate fast or slow time weightings based on the nature of the noise being measured. Additionally, the meter's calibration should be checked with an acoustic calibrator, which is a critical step that should be performed before making any measurements. These preparatory actions ensure the reliability and consistency of sound pressure level assessments across different scenarios.
measure sound levels

Class 1 vs. Class 2 Sound Level Meters

Understanding Accuracy and Applications

The most accurate sound level meters are Class 1 devices, which comply with the IEC 61672 international standard. This standard specifies the technical requirements and accuracy levels that sound level meters must meet. Class 1 meters are designed for applications requiring the highest precision, such as environmental noise monitoring and detailed acoustic analysis, distinguishing them from Class 2 meters, which are used for more general noise assessments. Adherence to IEC 61672 ensures the reliability and consistency of measurements critical for legal, occupational health, and environmental purposes.
the most accurate sound level meter

Sound Level Meter Software

Firmware, PC Analysis, and Mobile Integration

Sound level meter software is a comprehensive package that includes firmware, software for PC, and a mobile application, each serving a distinct function. The firmware, integral to the meter, facilitates core functions like data logging to the SD card and the time history of noise levels, enabling the meter to perform accurate measurements and compile the results. Upon transferring these results to a PC, the accompanying software supports detailed analysis with features such as graphing noise levels, re-calculations, and generating reports, providing a deeper insight into the data collected. Additionally, the mobile app extends the meter's functionality to smartphones, offering an enhanced user interface for on-the-go data logging, real-time noise level graphs, and the ability to integrate photographs with measurement data. This synergy between firmware, PC software, and mobile application ensures a versatile and user-friendly experience for sound level monitoring and analysis.
sound level meter software

Sound Level Meter for Classroom

Room Acoustics Parameters Measurements

A sound level meter for a classroom is a sound measuring device that meets IEC 61672 standards for accuracy and is capable of measuring room acoustics parameters such as reverberation time RT60 and speech intelligibility STIPA. The SV 971A is a sound level meter that can be used in a classroom. It meets IEC 61672 standards for accuracy and uses a sound level meter app for the measurement of room acoustics parameters such as reverberation time RT60 and speech intelligibility STIPA.
sound level meter for classroom

SV 971A Autocalibration

Streamlining Accuracy with Simplified Calibration

Autocalibration in the SV 971A sound level meter simplifies the calibration process, making it more efficient and user-friendly. This feature enables users to calibrate the meter by merely placing the calibrator over the microphone. During this process, the meter automatically detects the calibrator's presence and initiates the calibration sequence. The calibration data, including the date, time, and calibration level, are then automatically logged into a file within the meter's memory. This not only ensures the accuracy and reliability of the sound level measurements but also provides an auditable trail of calibration records, enhancing the credibility and compliance of the measurement data. Autocalibration thus streamlines the preparation for precise sound level monitoring, eliminating manual entry errors and saving time for professionals in the field.
auto calibration

Class 1 Sound Level Meter



Occupational Noise

ISO, OSHA, MSHA, and ACGIH noise at work guidelines

The Class 1 sound level meter's latest design adheres to the international IEC 61672 standard and the ANSI/ASA S1.4 standards in the United States, ensuring its accuracy for occupational noise measurements. It aligns with the stringent requirements of noise at work regulations by ISO, OSHA, MSHA, and ACGIH guidelines, making it an essential tool for industrial hygiene noise assessments aimed at preventing hearing loss. Equipped with a noise dose meter, it precisely calculates both the noise dose and exposure levels, facilitating comprehensive noise risk evaluations in the workplace.
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noise sampling

Sound Insulation

Sound insulation measurements following ISO 16283.

Sound insulation assessments are comprehensively addressed by the SV 971A, which aligns with ISO 16283 standards. The device is equipped with new hardware and an updated internal program, enabling advanced measurements like RT60 Reverberation Time and STIPA speech intelligibility, essential for evaluating the acoustic performance of buildings. These measurements are further facilitated by a dedicated mobile application, streamlining the process and providing accessible, user-friendly analysis. This integration ensures the SV 971A is a versatile tool for professionals conducting sound insulation and acoustic quality assessments in various environments.
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building acoustics

STIPA Voice Level Meter

Speech transmission indexes for public address systems.

The STIPA Voice Level Meter is specifically designed for evaluating speech transmission indexes in public address systems, ensuring clear communication in various environments. It utilizes a dedicated mobile application to streamline the organization of STIPA measurements and calculations. For accurate assessments, the STIPA signal is typically broadcast through the loudspeakers of the public information system being analyzed, although dedicated loudspeakers may also be employed to reproduce the signal under controlled conditions. This approach allows for the precise evaluation of speech intelligibility, critical for the effectiveness of public address systems.
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building acoustics measurements

Environmental Noise

Versatility in Environmental Noise Surveys for Type 1 and Type 2

The SV 971A can be used for environmental noise surveys and is capable of meeting the requirements for both Type 1 or Type 2 noise measurements, thanks to its compliance with international standards such as IEC 61672. As a Type 1 sound meter, the SV 971A offers the precision and accuracy required for Type 1 measurements, which are often needed for environmental noise assessments and compliance with various noise regulations. Its high level of accuracy, wide measurement range, and advanced features, such as real-time frequency analysis and the ability to connect to mobile applications for data management and analysis, make it suitable for comprehensive environmental noise surveys. This ensures that the SV 971A can effectively measure and analyze noise in accordance with the stringent criteria set forth by environmental noise regulations and standards, making it a versatile tool for professionals working in the field of acoustic measurement and noise control.
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environmental noise

Best Sound Level Meter


What is a Class 1 Sound Level Meter?

A Class 1 sound level meter is a sound level meter that meets IEC 61672 standards for accuracy. Take a look at the video and learn about the much more sophisticated instrument features of a professional class 1 sound level meter.

Sound Level Meter Price or Hire

Class 1 Sound Level Meter – SV 971A

Class 1 Sound Level Meter – SV 971A

The kit consists of SV 971A Class 1 sound level meter with detachable preamplifier SV 18A and new high quality omni-directional ACO SV 7152 microphone, compliant to IEC61094-4. The list of accessories includes: SA 22 windscreen, 32 GB microSD card, four AAA batteries, USB cable, and USB-DISC with user manual. Each SV 971A has its factory calibration certificate and 36 months warranty card.

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SVANPC++_BA - Building Acoustic Module License

SVANPC++_BA - Building Acoustic Module License

The optional PC software module provides a very powerful extension to the mobile application with the advanced calculations of reverberation time and sound insulation.

SVANPC++EM - Environmental Module License

SVANPC++EM - Environmental Module License

The PC software module is designed for data post-processing from noise and vibration measurements. It provides all necessary functionalities for marking / removing / recalculation...

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    SV 971A


    Class 1 Sound Level Meter – SV 971A


    Sound measurements
    Environmental noise
    Occupational noise
    Building acoustics

    Hardware Features

    Number of channels 1
    Self-vibration detection
    Communication Interfaces USB, Bluetooth
    Keyboard 8 keys
    Memory uSD card 32 GB
    Battery type 4 x AAA
    Operating time 16-24 hours
    Operating temperature range -10 °C to 50 °C (14 °F to 122 °F)
    Humidity range up to 95 % RH, non-condensed
    Weight 225 grams
    Size 232.5 x 56 x 20 mm

    Sound measurements features

    Standards Class 1: IEC 61672-1:2013, Class 1: IEC 61260-1:2014
    Type approvals Pending
    Microphone type ACO 7152
    Preamplifier type SV 18A
    Linear operating range to IEC 61672 24 dBA Leq ÷ 140 dBA Peak
    Total measurement range 17 dBA Leq ÷ 140 dBA Peak
    Internal noise < 17 dBA Leq
    Frequency range 5 Hz ÷ 20 kHz
    Weighting filters Frequency weighting: A, B, C, Z, LF
    Time constants Time Weighting: Slow, Fast, Impulse
    Exchange rates 2, 3, 4, 5, 6
    Criterion levels adjustable
    Profiles per channel 3
    Min logging step 100 ms / 2 ms in RT60
    Statistics Ln (L1-L99)
    Statistics in octaves or third octaves
    Audio recording option
    Voice coments
    1/1 octave option
    1/3 octave option
    RT60 option
    STIPA option

    Sound Level Meter PDF and Software