Using a Moving Microphone in Testing STC for Material Sound Insulation

Using a Moving Microphone in Testing STC for Material Sound Insulation

Acoustic Camera, Calibration, Newsletter, Sound Absorption /

Acoustic Laboratory Thailand (ALT) uses a Moving Microphone to test Airborne Sound Insulation (STC, Rw) to achieve the highest level of accuracy in acoustic testing. Measuring the Sound Transmission Class (STC) is a crucial process for evaluating the sound insulation performance of materials and structures according to ASTM E90 and ISO 10140-2 standards. Typically, STC […]

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(dodecaheron) speaker directivity calibration

(dodecaheron) speaker directivity calibration

Calibration /

When is the late time that you calibrated your dodecahedron or other speaker used for acoustic measurements? Recommended period is not over 2 years. Speaker Testing Services According to Standards by ALT LaboratoryAt Acoustic Laboratory Thailand Co., Ltd. (ALT), we are committed to providing testing and calibration services for acoustic equipment in accordance with international

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Initial material inspection before testing with Acoustic Camera

Initial material inspection before testing with Acoustic Camera

Acoustic Camera /

This video is an introduction to the service of checking the materials before testing with (Acoustic Camera), which is an important step in evaluating the performance and installation of materials to ensure that the materials used can reduce or block noise as expected. This will help the materials to be installed correctly and ready for

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Calibration of sound meters according to standards

Calibration, ISO /

Using standardized sound measurement instruments also requires standardized calibration. It is important to choose a calibration laboratory that is certified to ISO/IEC17025 standards. But this is not all to look out for, the laboratory should also be accredited for the required methods and standards for the calibration of instruments. ISO/IEC17025 has a wide range and

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ALT, Acoustic Laboratory (Thailand) Achieves ISO 17025 Accreditation, Demonstrating Commitment to Excellence in Acoustic Testing 

ISO /

[Bangkok, Thailand, 18 December 2023] – ALT, Acoustic Laboratory (Thailand), a leading provider of acoustic testing services in Thailand, is proud to announce that it has achieved ISO 17025 accreditation, a significant milestone that underscores the company’s dedication to delivering high-quality and reliable acoustic testing solutions.  ISO 17025 is an internationally recognized standard that specifies

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How and why to calibrate Acoustic measurement instruments

Calibration /

How to calibrate Acoustic measurement instruments Why calibrate Acoustic measurement instruments There are many reasons why acoustic instrument calibration is important. Here are a few of the most important ones:  Accuracy and Reliability: Sound level meters are precision instruments that measure sound pressure levels. Over time and with usage, their performance can drift. Calibration ensures

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What is ASTM

ASTM /

Organized in 1898, ASTM International is one of the world’s largest international standards developing organizations. Defined and set by us, ASTM standards improve the lives of millions every day. Combined with our innovative business services, they enhance performance and help everyone have confidence in the things they buy and use – from the toy in

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What is ISO/IEC 17025

ISO /

What is ISO/IEC 17025:2017? ISO/IEC 17025 Standards for the competence of testing and calibration laboratories, is the main ISO standard used for testing and calibration laboratories and is used worldwide, and is the same across the globe despite the different names that you may come across. Each country has their own entity authorized by ISO that manages the

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Sound Absorption

Sound Absorption /

Sound Absorption What is Absorption? Absorption refers to the process by which a material, structure, or object takes in energy when waves are encountered, as opposed to reflecting the energy. Part of the absorbed energy is transformed into heat and part is transmitted through the absorbing body. The energy transformed into heat is said to have been ‘lost’. (e.g. spring, damper etc.) What is Sound Absorption?

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What is Calibration

Calibration /

What is Calibration Calibration is a process of documenting and adjusting the reading of measurement instruments Sound measurement is one of the measurements which is considered to be important in a lot of different industries. For example, automotive, manufacture, HSE, research and so on. One of the aspect that is important for all measurements are

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