Class 2 Sound Level Meter SV 973A

The SV 973A is a professional Class 2 sound level meter designed for occupational noise and environmental assessments. Fully compliant with BS EN 61672-1:2013, it features a patented MEMS microphone with a lifetime warranty, extended operating range from 25 to 141 dB Peak, and real-time 1/1 and 1/3 octave analysis. With built-in Bluetooth® and support for the Assistant Pro mobile app, the SV 973A is ideal for HSE-compliant noise monitoring in UK workplaces.

The Best Class 2 Noise Meter

The SV 973A stands out as the best Class 2 sound level meter thanks to its robust MEMS microphone and advanced sound exposure features. With a wide dynamic range and compliance with BS EN 61672-1:2013, this device meets UK professional expectations for industrial, environmental, and occupational noise assessments.

The SV 973A also supports real-time 1/1 and 1/3 octave analysis, STIPA, and RT60 measurements—functions rarely found in Class 2 instruments. Combined with a Bluetooth® interface and Assistant Pro app, this meter provides unmatched functionality for daily use in the field.

Features

Accuracy

Class 2 performance according to BS EN 61672-1

The SV 973A meets the BS EN 61672-1:2013 standard, offering accurate measurements across 20 Hz to 10 kHz with ±1.1 dB deviation. It features two distinct measuring ranges for sound level (30 dBA to 129 dBA Peak) and sound exposure (45 dBA to 141 dBA Peak), supporting reliable use in both workplace and environmental assessments.
class 2 accuracy

Frequency Analysis

Real-time octave filters and WAV recording

The SV 973A enables 1/1 and 1/3 octave analysis for precise identification of noise sources. It also supports WAV recording to capture noise events, allowing post-analysis and sound source documentation, ideal for detailed acoustic diagnostics.
Noise Frequency Analysis

Digital Meter

Sound level data acquisition and logging

The meter uses an analog-to-digital converter (ADC) and advanced weighting filters to transform ambient sound into digital readings. Results are logged in 8 GB memory as time histories and can be exported to PC software for deeper analysis and reporting.
Basic Class 2 Sound Level Meter

Class 2 vs. Class 1

Differences in accuracy and measurement range

Class 2 meters, such as the SV 973A, maintain ±1.1 dB accuracy from 20 Hz to 8 kHz and operate from –10°C to +50°C. Compared to Class 1 meters, which offer tighter ±0.8 dB accuracy from 16 Hz to 16 kHz, Class 2 models offer greater flexibility for field applications.
Difference between Class 2 and Class 1 Sound Meter

Microphone

MEMS-based technology with lifetime durability

The SV 973A microphone is based on MEMS technology, delivering shock resistance, low energy consumption, and a lifetime warranty. It supports consistent accuracy within the Class 2 specification, enhancing reliability and battery life.
Microphone

Mobile Application

Assistant PRO for remote operation and alerts

The meter connects via Bluetooth® to the Assistant PRO app, enabling remote control, real-time viewing, and features like STIPA and RT60 measurement. This mobile integration streamlines noise monitoring and reporting directly from smart devices.
Sound Level Meter APP

Auto Calibration

Fast acoustic calibration with stability tracking

The SV 973A features automatic dual-point calibration (94 dB and 114 dB), storing results and comparing them to past calibrations to track microphone drift. This ensures field-ready accuracy and simplified compliance checks.
calibration

RT 60

Reverberation time measurement for acoustic spaces

The RT60 function allows precise reverberation time analysis, essential for environments such as classrooms. By following acoustic standards for decay times, the meter helps ensure optimal speech intelligibility and compliance with sound clarity requirements.
rt 60

Catalogue

Download Class 2 Noise Meter Brochure

Download the SV 973A Class 2 Sound Level Meter catalogue to explore its advanced features, including real-time frequency analysis, triggered audio recording, and extended STIPA and RT60 measurement capabilities. This compact and durable meter is ideal for occupational noise assessments, offering high performance with low power consumption and full mobile app integration for streamlined field operation.

Applications

Occupational Noise Measurements

Class 2 Noise at Work Assessments

The SV 973A is a Class 2 Sound Level Meter designed for workplace noise assessments in line with UK Control of Noise at Work Regulations 2005 and BS EN 61672-1. It measures up to 141 dB and delivers accurate results even in harsh industrial environments. With its durable MEMS microphone and easy-to-use interface, it ensures efficient and compliant noise monitoring.

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occupational noise

Class 2 Sound Measurements

Accurate noise assessments up to 10 kHz

The SV 973A Class 2 Sound Level Meter measures sound pressure levels up to 10 kHz, fully compliant with BS EN 61672-1:2013. It supports A, C and Z frequency weightings and time-weighted measurements, ensuring reliable results in schools, workplaces, and construction sites. Built for precision and ease of use, it’s ideal for both environmental and occupational noise monitoring.

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sound measurements

STIPA in accordance with BS EN 60268

Class 2 Speech Transmission Measurements

STIPA, as defined in BS EN 60268-16, assesses the speech intelligibility of public address and voice alarm systems in venues like airports, concert halls, and shopping centres. The method requires a Class 2 sound level meter compliant with BS EN 61672-1, such as the SV 973A. With support from the Building Acoustics PRO app, the SV 973A enables efficient STIPA analysis and system performance evaluation.

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stipa-sti

Videos

The Best Class 2 Sound Level Meter

The class 2 sound level meter is a professional sound measuring device, which can measure the noise of various environments.

Professional Type 2 Noise Meter

With its high accuracy and wide range of measurement, it's perfect for any noise survey.

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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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