Class 2 Sound Level Meter
SV 973A

Class 2 Sound Level Meter SV 973A is designed in accordance with IEC 61672-1:2013, ensuring accurate and professional sound level monitoring across various workplaces. The SV 973A is the best Class 2 Sound Level Meter because it meets the standards of precision and durability and is equipped with a state-of-the-art microphone with MEMS technology that comes with a lifetime warranty. The SV 973A specification exceeds the standard requirements for precision offering frequency range up to 10 kHz and temperature operating range from -10 to 50°C. With an impressive measurement range spanning from 25 dB to 129dB, it accurately measures industrial and environmental noise, even in low background noise. For comprehensive workplace sound analysis, the SV 973A is equipped with an intelligent sound exposure meter function that can extend the measurement range up to 141 dB Peak. It quantifies broad-band sound results (LEQ, MIN, MAX, PEAK), incorporating all essential weighting filters. To cater to more advanced noise frequency analysis, optional 1/1 or 1/3 octave band filters are available. The SV 973A sound level meter is tailored for mobility, maintaining a compact and lightweight design without compromising on functionality. Its dual MEMS microphones construction enhances its robustness and versatility, making it the go-to instrument for on-the-go use. Trust in the SV 973A for a reliable, portable, and advanced solution to your sound level monitoring needs.

What is a Class 2 Sound Level Meter?

Class 2 Sound Level Meter, also known as Type 2 Sound Level Meter, is a professional noise level meter designed to meet the requirements of the IEC 61672-1:2013 standard for precision and accuracy. The specifications for Class 2 and Class 1 sound level meters share similar design goals, primarily differing in their acceptance limits and operational temperature ranges. The acceptance limits for a Class 2 Sound Level Meter are generally equal to or greater than those of a Class 1 meter, depending on frequency. The accuracy of a Class 2 Sound Level Meter is specified by IEC within a range of 20 Hz to 8 kHz, and a temperature range from 0 to 40°C. As per the IEC 61672 standard, a Class 2 Sound Level Meter is equipped with a microphone, a preamplifier, and a signal processor. These components work in unison to capture and process noise levels, which are then displayed on an integrated screen. This design ensures accurate, reliable results in professional noise level monitoring applications.

Class 2 IEC61672

Frequency Analysys

MEMS Microphone

Type 2 Sound Level Meter PDF

Catalogue

SV 973A Type 2 Sound Level Meter

The new Type 2 Sound Level Meter introduces cutting-edge features including real-time frequency analysis, triggered audio recording, time-history logging, and advanced RT 60 and STIPA measurements. Additionally, with the dedicated sound level meter mobile app available for both iOS and Android devices, SV 973A can efficiently streamline noise-at-work sampling tasks, delivering rapid and accurate results. Leverage these capabilities to conduct precise noise level measurements with greater ease and efficiency.

Download Class 2 Sound Level Meter PDF

Class 2 Digital Sound Level Meter

Features

Class 2 Sound Level Meter Accuracy

How accurate is a Class 2 sound level meter?

According to IEC 61672 standards, the Class 2 sound level meter operates over a frequency range of 20 Hz to 10 kHz, maintaining linearity deviations of +/- 1.1 dB. Within these parameters, the SV 973A offers two decibel (dB) ranges: a sound level meter (30 dBA RMS to 129 dBA Peak according to IEC 61672) and a sound exposure meter (45 dBA RMS to 141 dBA Peak according to IEC 61672). These dual ranges allow for versatile applications, including workplace, environmental noise monitoring and building acoustics. The Class 2 sound level meter, with its broad measurement capabilities and rigorous accuracy, is proving to be an invaluable tool in a wide range of sound measurement scenarios.

Noise Frequency Analysis

Options for 1/1 and 1/3 Octave Band analysis, WAV Recording

The professional Class 2 Sound Level Meter utilizes 1/1 and 1/3 Octave analysis for precise identification of noise sources. The detailed results derived from these analyses serve as crucial data in formulating noise reduction strategies and selecting appropriate hearing protection devices. An added feature is the option for Sound WAV recording. This is particularly useful for unattended noise source recognition and for enhancing sound time history with actual noise samples. This recorded WAV file can be post-processed in a software application, paving the way for precise sound engineering calculations. With these capabilities, the Class 2 Sound Level Meter not only identifies and measures noise levels but also provides the necessary data for effective noise management and engineering solutions.

Basic Class 2 Sound Level Meter

How does the Basic Class 2 Sound Level Meter work?

As a Basic Class 2 Sound Level Meter, the SV 973A leverages its analog-digital converter (ADC) and time weightings to convert noise measurements into a digital signal. This signal is displayed on the screen in decibels. Noise readings are archived in the meter's 8GB memory as time histories with integration intervals, providing a comprehensive record of noise levels over time. Users can download this data and visualize it through graphs, tables, and reports using the included PC software application. This detailed review of noise data offers an in-depth understanding of sound patterns and trends, proving valuable for environmental and workplace noise analysis and control.

Difference between Class 2 and Class 1 Sound Meter

What is the difference between Class 1 and Class 2 sound meter?

The key difference between Class 1 and Class 2 Sound Level Meters lies in their accuracy across different frequency and temperature ranges. As per the IEC 61672 standard, a Class 1 Sound Level Meter is expected to maintain an accuracy within a linearity of +/-0.8 dB over a frequency range of 16Hz to 16 kHz. In contrast, a Class 2 Sound Level Meter must maintain an accuracy within a linearity of +/-1.1 dB over a frequency range of 20 Hz to 8 kHz. The SV 973A goes above and beyond these requirements, offering accurate measurements over an extended temperature range of -10 to 50°C.

Class 2 Sound Level Meter Microphone

Why Class 2 Sound Level Meter Microphone is a critical component?

Class 2 Sound Level Meter Microphone is a critical component as it is responsible for capturing noise samples. In contrast to traditional condenser microphones, the MEMS (Micro-Electro-Mechanical Systems) microphone featured in our meter is notably shock-resistant and consumes less power. This energy efficiency extends the battery life to 38 hours and allows us to confidently offer a lifetime warranty. Importantly, these enhancements don't compromise the microphone's frequency range or accuracy, which still meet the Class 2 requirements outlined in the IEC 61672 standard.

Class 2 Sound Level Meter APP

What is Class 2 Sound Level Meter APP?

Class 2 Sound Level Meter APP is a mobile app for iOS and Android called Assistant PRO. The Class 2 Sound Level Meter SV 973A offers seamless integration with the Assistant PRO app, available for iOS and Android devices. This mobile application significantly extends the meter's noise measurement capabilities, allowing remote start/stop functions, and even enabling Speech Transmission Index for Public Address Systems (STIPA) or Reverberation Time (RT60) measurements using your smart device. Equipped with a low-power Bluetooth® interface, the SV 973A can relay real-time measurement results to your smartphone or tablet, providing instant access to noise level data. The app's user-friendly interface also allows easy control over measurement operations, such as starting or stopping a test. Additionally, the Assistant PRO application can be set to alert users when noise levels exceed pre-set limits, ensuring consistent and safe monitoring of environmental noise.

Class 2 Sound Level Meter Calibration

How do you calibrate a Class 2 Sound Level Meter?

Field calibration of the Class 2 Sound Level Meter SV 973A is swift and effortless using an acoustic calibrator. As soon as the microphone is inserted into the calibrator, automatic calibration begins at two predefined levels, 94 dB and 114 dB. This autocalibration feature recognises the calibration signal and commences the calibration process, recording the results directly into the meter's memory. A unique feature of the SV 973A is its ability to compare the results of the field calibration with previous data. This function enables tracking of potential microphone drift over time, ensuring that the device maintains its high level of accuracy. By facilitating on-the-spot calibration and enabling drift tracking, the SV 973A ensures consistent, reliable noise measurement data, both before and after measurements are taken. This feature significantly enhances the sound meter's practicality and precision, particularly in professional and industrial settings.

Reverberation Time Measurements RT60

Reverberation Time Measurements with Class 2 Accuracy

Reverberation Time Measurements with Class 2 Accuracy can be used in schools noise application. According to the Acoustical Society of America, the recommended maximum reverberation time for unoccupied classrooms (up to 566 m^3 in volume) is 0.6 seconds in the 500 Hz to 2000 Hz octave bands. For larger rooms, the maximum recommended reverberation time is 0.7 seconds. By measuring and adjusting the reverberation time using materials that absorb sound rather than reflect it, schools can create a more acoustically-friendly learning environment. For Reverberation Time Measurements, a Class 2 sound level meter like the SV 973A could be used, providing a cost-effective yet accurate solution.

mobile applications for sound level meter

Class 2 Sound Level Meter Accuracy

How accurate is a Class 2 sound level meter?

Noise Frequency Analysis

Options for 1/1 and 1/3 Octave Band analysis, WAV Recording

Basic Class 2 Sound Level Meter

How does the Basic Class 2 Sound Level Meter work?

Difference between Class 2 and Class 1 Sound Meter

What is the difference between Class 1 and Class 2 sound meter?

Class 2 Sound Level Meter Microphone

Why Class 2 Sound Level Meter Microphone is a critical component?

Class 2 Sound Level Meter APP

What is Class 2 Sound Level Meter APP?

Class 2 Sound Level Meter Calibration

How do you calibrate a Class 2 Sound Level Meter?

Reverberation Time Measurements RT60

Reverberation Time Measurements with Class 2 Accuracy

Class 2 Noise Measurements

Applications

Occupational Noise Measurements

Class 2 Noise at Work Measurements

Designed to meet the stringent accuracy requirements of international health and safety bodies, including NIOSH SLM, OSHA, MSHA, ACGIH, and ISO, the Class 2 Sound Level Meter SV 973A is an invaluable tool for Occupational Noise Measurements. Its sound exposure meter, capable of measuring up to 141 dB, ensures the capture of precise data in a variety of occupational noise environments. The SV 973A is equipped with a MEMS microphone, particularly suited to occupational noise measurement applications, where sound meters must withstand demanding conditions. The simplicity of the SV 973A's user interface, coupled with the dedicated PC software application, Supervisor, appeals to professionals who require a straightforward approach to managing noise data.

Class 2 Sound Measurements

Sound measurements in a frequency range to 10 kHz

Class 2 Sound Measurements refer to the measurements made using a Class 2 Sound Level Meter, a device designed to accurately measure sound pressure levels in various environments. These measurements are conducted following the guidelines and standards set by the International Electrotechnical Commission (IEC), specifically the IEC 61672-1:2013 standard. Class 2 Sound Level Meters are commonly used in settings such as workplaces, construction sites, schools, and other environments where noise monitoring is required. The SV 973A Class 2 Sound Level Meter is an exemplary tool for various professional applications, both in the workplace and in environmental contexts. It excels by offering time-weighted sound pressure level measurements as well as time-averaged sound levels. With the capability to apply A, C, and Z frequency weightings, it provides comprehensive and versatile functionality for sound level analysis. Therefore, it stands as an outstanding choice for Class 2 applications requiring a blend of precision, reliability, and ease of use.

STIPA in accordance with IEC 60268

Class 2 Speech Transmission Measurements

STIPA in accordance with IEC 60268 (Speech Transmission Index for Public Address systems) is a method of measuring the intelligibility of public address (PA) and voice alarm (VA) systems. These systems are often found in large building complexes, including airports, railway stations, shopping centres, and concert halls. STIPA measurements ensure that these systems deliver clear, understandable announcements even in complex acoustic environments. The STIPA method adheres to the IEC 60268-16 standard. It's necessary to use a sound level meter that meets the requirements of IEC 61672-1 and has the STIPA functionality compliant with IEC-60268-16. The SV 973A Class 2 Sound Level Meter is such a device. To facilitate the organisation of STIPA measurements and calculations, a dedicated mobile application called Building Acoustics PRO supports the SV 973A. This application aids in the analysis and interpretation of the measurements, providing a comprehensive assessment of the PA or VA system's performance.

Occupational Noise Measurements

Class 2 Noise at Work Measurements

Class 2 Sound Measurements

Sound measurements in a frequency range to 10 kHz

STIPA in accordance with IEC 60268

Class 2 Speech Transmission Measurements

Best Class 2 Sound Level Meter

Videos

The Best Class 2 Sound Level Meter

Why the SV 973A is Best Class 2 Sound Level Meter?

Professional Type 2 Noise Meter

What are the features of Professional Type 2 Noise Meter?

Class 2 Sound Level Meter for Sale

Price

Class 2 Sound Level Meter SV 973A

The kit consist of SV 973A Class 2 sound level meter equipped with a new robust MEMS microphone with a life-time warranty. The kit includes: SA 22 windscreen, SA 80 soft bag for the instrument, 8 GB built-in memory, four AAA batteries, USB-C cable, and a usb-stick with a user manual. Each SV 973A has its factory calibration certificate and 36 months warranty upon product registration.

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SF973_1 - Firmware option to SV 973: 1/1 octave analysis

The firmware option to SV 973: 1/1 octave analysis

SF973_2 - Firmware option to SV 973: 1/3 octave analysis

The firmware option to SV 973: 1/3 octave analysis

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Technical

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

Files

Downloads

Information Materials
Firmware & Software

Data Sheet

Declaration of Conformity

User Manual

Firmware