Class 2 Microphone

IEC 61672-1:2002 | IEC

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Tolerance limits for class 2 specifications are greater than, or equal to, those for class 1 specifications. Sound level meters conforming to the requirements of this standard have a specified frequency response for sound incident on the microphone from one principal direction in an acoustic free field or from random directions.

IEC 61672-1:2013 | IEC

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Sound level meters may be designed for use with an operator present or for automatic and continuous measurements of sound level without an operator present. Specifications in this standard for the response to sound waves apply without an operator present in the sound field.

Class 2 Sound Level Meter | Noise dBA | Type 2 | Svantek 973A

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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. 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. ... 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. 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. ... 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. 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. Read more ... 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.

IEC 61672 - A Standard for Sound Level Meters Explained | Cirrus ...

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Tolerance limits for class 2 specifications are greater than, or equal to, those for class 1 specifications. Sound level meters conforming to the requirements of this standard have a specified frequency response for sound incident on the microphone from one principal direction in an acoustic free field or from random directions. Provides details of the tests necessary to verify conformance to all mandatory specifications given in IEC 61672-1:2002 for conventional sound level meters, integrating-averaging sound level meters and integrating sound level meters. The current standard for sound level meters, IEC 61672, is published in three parts. Here our explanation of IEC 61672 and what these parts mean for sound level meters. The first part, Part 1, details the performance characteristics that a Class 1 or Class 2 sound level meter should have. Describes procedures for periodic testing of conventional, integrating-averaging, and integrating sound level meters conforming to the class 1 or class 2 requirements of IEC 61672-1:2002. Periodic tests described in this part of IEC 61672 apply to sound level meters for which the model has been, or has not been, pattern approved by an independent testing organization responsible for pattern approvals and in accordance with the test procedures of IEC 61672-2:2003. Periodic tests described in this part of IEC 61672 also apply to sound level meters for which the manufacturer claims conformance to the requirements of IEC 61672-1.

IEC 61672-1 Edition 2.0 2013-09 INTERNATIONAL STANDARD NORME ...

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International Standard IEC 61672-1 has been prepared by IEC technical committee 29, A list of all parts of the IEC 61672 series, published under the general title Electroacoustics – The first edition (2002) of IEC 61672-1 accounted for measurement uncertainty by giving two NOTE The AU frequency weighting specified in IEC 61012 can be applied for measurements of A-weighted sound · levels of audible sound in the presence of a source that contains spectral components at frequencies greater than ... Two performance categories, class 1 and class 2, are specified in this standard.

Type and Class of a Sound Level Meter - A Definition

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The Type or Class of a sound level meter describes its accuracy as defined by the relevant international standards - Class 1 is more accurate than Class 2. The older standard IEC 60651 referred to the grade as "Type", whereas the new standard IEC 61672 refers to it as the "Class". Although older meters meeting the IEC 60651 (and IEC 60804) can continue to be used for most applications, when purchasing a new meter you should get one that meets the new standard IEC 61672. There can be other reasons for selecting the class of meter. Our Class 1 meters tend to measure lower levels due the sensitivity of the microphone capsule. This is particularly relevant for environmental noise surveys where low noise levels are being measured.