Class 2 Sound Level Meter SV 973A

The SV 973A is a Class 2 Sound Level Meter engineered to IEC 61672-1:2013 standards, ensuring precise, professional noise measurements across diverse workplaces. This advanced instrument features a state-of-the-art MEMS microphone with a lifetime warranty, delivering robust durability and reliable performance. With a frequency range up to 10 kHz and an operating temperature from -10°C to 50°C, the SV 973A exceeds standard requirements for Class 2 precision. Its wide measurement span from 25 dB to 129 dB and Peak up to 141 dB enables accurate assessments of both industrial and environmental noise, including in low background conditions. Optional 1/1 and 1/3 octave band filters enable detailed frequency analysis, while the dual MEMS microphone construction ensures portability and versatility for on-the-go professionals. The SV 973A combines accuracy, durability, and mobility, making it the trusted solution for comprehensive sound level monitoring.

Class 2 sound level meter
Class 2 IEC61672
noise frequency analysis
Frequency Analysys
MEMS microphone
MEMS Microphone

What is a Class 2 Sound Level Meter?

A Class 2 Sound Level Meter is a professional noise measurement instrument built to IEC 61672-1:2013 standards, delivering precision and accuracy in a defined frequency range of 20 Hz to 8 kHz and a temperature range from 0°C to 40°C. While sharing many design elements with Class 1 meters, Class 2 meters differ in acceptance limits and are ideal for general workplace, environmental, and industrial noise monitoring. Each meter integrates a microphone, preamplifier, and signal processor, ensuring consistent, reliable results displayed on an integrated screen for every professional application.

Features

Class 2 Sound Level Meter Accuracy

Precision and versatility define SV 973A performance.

The SV 973A meets IEC 61672 standards for Class 2 meters, offering linearity deviations within ±1.1 dB across a frequency range of 20 Hz to 10 kHz. Dual measurement ranges for sound level and sound exposure enable reliable assessments in workplace, environmental, and building acoustics applications, making the SV 973A a robust and adaptable tool for precise sound monitoring.
sv973a class 2 sound level meter

Noise Frequency Analysis

Octave band filters and WAV recording empower advanced noise diagnostics.

The SV 973A offers optional 1/1 and 1/3 octave band analysis, enabling precise identification of noise sources and supporting effective noise reduction strategies. Integrated WAV recording allows users to capture actual sound samples for post-processing and detailed time history analysis, delivering comprehensive data for sound engineering and tailored hearing protection.
Noise Frequency Analysis

Class 2 Sound Level Meter Functionality

Digital conversion and data logging enable detailed noise analysis.

The SV 973A uses an advanced analog-digital converter and time weightings to transform sound measurements into digital decibel readings, instantly displayed on its screen. Noise readings are archived as time histories in 8GB memory, allowing users to download, visualize, and analyze data with included PC software for comprehensive workplace and environmental noise assessments.
Logging sound level meter

Class 2 vs. Class 1 Sound Meters

Accuracy and frequency range distinguish Class 1 from Class 2 instruments.

Class 1 sound meters maintain ±0.8 dB accuracy across 16 Hz to 16 kHz, while Class 2 sound meters, such as the SV 973A, offer ±1.1 dB accuracy from 20 Hz to 8 kHz, in line with IEC 61672 standards. The SV 973A exceeds Class 2 requirements with a broad operating temperature range from -10°C to 50°C, delivering reliable measurements in diverse conditions.
Professional sound level meters

Class 2 Sound Level Meter Microphone

MEMS technology ensures durability, efficiency, and accuracy.

The SV 973A uses a MEMS microphone that is shock-resistant and energy-efficient, delivering up to 38 hours of battery life and supporting a lifetime warranty. Despite its robust construction, the microphone fully meets Class 2 frequency and accuracy requirements set by IEC 61672, making it a reliable and critical component for professional noise measurement.
patented mems microphone

Class 2 Sound Level Meter APP

Mobile integration enhances measurement control and data access.

The SV 973A pairs with the Assistant PRO app for iOS and Android, enabling remote measurement control, real-time data viewing, and advanced functions like STIPA and RT60 analysis via low-power Bluetooth®. The app’s intuitive interface offers instant alerts for noise limits and simplifies test management, making environmental and occupational noise monitoring more efficient and accessible.
Sound Meter Apps

Class 2 Sound Level Meter Calibration

Automatic field calibration ensures consistent measurement accuracy.

The SV 973A supports autocalibration at 94 dB and 114 dB, automatically recognizing calibration signals and logging results in memory as soon as the microphone is inserted into the calibrator. A unique drift comparison feature allows users to track calibration data over time, ensuring ongoing accuracy and reliability for every noise measurement session.
sound level meter calibration

Reverberation Time RT60

Class 2 accuracy supports effective classroom acoustic assessments.

The SV 973A measures RT60 reverberation time in line with acoustic standards, helping schools achieve recommended maximum reverberation times of 0.6–0.7 seconds for optimal learning environments. Learn more about Reverberation Time Measurements. By using sound-absorbing materials and the SV 973A’s precise measurements, schools can significantly improve classroom acoustics and student comfort.
mobile applications for sound level meter

Catalogue

Explore the SV 973A’s Advanced Features and Applications

Discover how the SV 973A sets a new standard with real-time frequency analysis, triggered audio recording, time-history logging, and advanced RT60 and STIPA measurements. Download the full product catalogue to see how the dedicated mobile app for iOS and Android makes noise-at-work assessments faster, easier, and more accurate.

Applications

Occupational Noise Measurements

Compliance with NIOSH SLM, OSHA, MSHA, ACGIH, and ISO standards ensures reliable workplace assessments.

The SV 973A delivers accurate noise exposure measurements up to 141 dB, meeting strict international health and safety guidelines for occupational environments. A robust MEMS microphone and user-friendly software make the SV 973A ideal for professionals, providing durable performance and efficient data management in demanding workplace conditions.

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noise at work

Class 2 Sound Measurements

Accurate measurements up to 10 kHz support diverse monitoring needs.

The SV 973A measures sound pressure levels in full compliance with IEC 61672-1:2013, making it suitable for workplaces, schools, construction sites, and environmental monitoring. Flexible A, C, and Z frequency weightings and time-averaged level analysis ensure precise, reliable results for any professional Class 2 sound measurement application.

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noise sources

STIPA in accordance with IEC 60268

Class 2 accuracy ensures reliable speech transmission measurements in public address systems.

The SV 973A performs STIPA measurements compliant with IEC 60268-16, enabling precise assessment of speech intelligibility in PA and VA systems found in airports, stations, and public venues. The Building Acoustics PRO app streamlines the organization, analysis, and interpretation of STIPA data, ensuring that voice announcements remain clear and effective in complex acoustic environments.

Read more
classrom acoustic

Videos

The Best Class 2 Sound Level Meter

See why the SV 973A is the top choice for Class 2 sound measurements.
Watch the video to discover how its MEMS microphone, wide measurement range, and advanced features set a new standard for accuracy and reliability.

Professional Type 2 Noise Meter

Explore the professional features of the SV 973A.
Watch the video to learn about real-time frequency analysis, mobile app integration, and robust design that make the SV 973A ideal for demanding noise monitoring applications.

Check Availability & Price

Class 2 Sound Level Meter SV 973A

Class 2 Sound Level Meter SV 973A

The kit includes the SV 973A Class 2 sound level meter with robust MEMS microphone (lifetime warranty) • SA 22 windscreen • SA 80 soft bag • 8 GB built-in memory • four AAA batteries • USB-C cable • USB drive with user manual • factory calibration certificate • 36-month warranty card upon registration.
SV 34B - Class 2 Sound Calibrator

SV 34B - Class 2 Sound Calibrator

Sound Calibrator Class 2 : 1000 Hz/114 dB

SA 22 - Windscreen for 1/2

SA 22 - Windscreen for 1/2"" microphone (70 mm)

Windscreen for 1/2" microphone (70 mm)

SV_CA_SLM - Accredited calibration of the sound level meter according to EN 61672-3:2014

SV_CA_SLM - Accredited calibration of the sound level meter according to EN 61672-3:2014

Accredited calibration of the sound level meter according to EN 61672-3:2014

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    Specifications

    Class 2 Sound Level Meter SV 973A

    Applications

    Sound measurements
    Occupational noise
    Building acoustics

    Hardware Features

    Number of channels
    1
    Self-vibration detection
    Auto-calibration
    Bluetooth
    Communication Interfaces
    USB, Bluetooth
    Display
    Keyboard
    8 keys
    Memory
    internal 8 GB
    Battery type
    4 x AAA
    Operating time
    20-38 hours
    Operating temperature range
    -10 °C to 50 °C
    Humidity range
    up to 95% RH, non-condensed
    Weight
    225 g
    Size
    229 x 52 x 20 mm

    Sound measurements features

    Standards
    Class 2: IEC 61672-1:2013
    Microphone type
    MEMS
    Preamplifier type
    Integrated
    Linear operating range to IEC 61672
    SLM: 30 dBA Leq÷141 dBA Peak
    Total measurement range
    25 dBA Leq÷141 dBA Peak
    Internal noise
    < 25 dBA RMS
    Frequency range
    20 Hz ÷ 10 kHz
    Weighting filters
    Frequency weighting: A, C, Z
    Time constants
    Slow, Fast, Impulse
    Exchange rates
    2, 3, 4, 5, 6
    Criterion levels
    adjustable
    Profiles per channel
    3
    Min logging step
    100 ms
    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

    Downloads

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