DASM Institute – Sound Absorption Coefficient Measurement Service in Reverberation Room According to ISO 354 & ASTM C423 Standards

Sound Absorption Coefficient Material Testing Service at DASM Institute according to ISO 354 & ASTM C423 standards, helping businesses evaluate and optimize the sound absorption performance of materials. The laboratory meets VILAS standards, ensuring accurate and objective results

Introduction to sound absorption testing service at DASM Institute

In the field of acoustics, accurately evaluating the sound absorption capacity of materials plays an important role in architectural design, interior production, and professional audio systems. DASM Institute, a pioneer unit in acoustic research and testing in Vietnam, provides sound absorption coefficient measurement services according to ISO 354 & ASTM C423 standards.

With a VILAS-standard laboratory, DASM Institute ensures accurate and objective results, helping businesses and manufacturers evaluate the sound absorption performance of products, thereby improving and optimizing material quality before launching to the market.

Sound insulation testing of Remak® XPS foam in the impedance tube at the laboratory – Institute for Development and Application of Acoustic Materials (DASM)

How important is the sound attenuation testing of ductwork?

Adapter Noise Measurement According to ISO 3745-2012 – Quality Inspection at DASM Institute

What is the sound absorption coefficient?

The sound absorption coefficient is also known as the sound absorption index, which is an important indicator showing the ability of a material to absorb sound waves. This index ranges from 0 to 1, in which:

• Coefficient = 0: The material reflects all sound (e.g., metal surfaces, glass, hard concrete).
• Coefficient = 1: The material absorbs all sound (e.g., Thai rockwool, specialized acoustic foam).

Determining this coefficient helps evaluate the sound absorption efficiency of materials, thereby adjusting and optimizing products to meet the technical requirements of each project or practical application.

Method for sound absorption coefficient testing at DASM Institute

Testing standards

At DASM Institute, the process of measuring the sound absorption coefficient is carried out according to two international standards:

• ISO 354: Reverberation Room Method, evaluating the sound absorption level of materials in an environment with many sound reflections.
• ASTM C423: A common testing procedure in the United States, measuring the sound absorption coefficient across frequency bands from low to high.

Testing process at DASM

Step 1: Material sample preparation

• Material samples are prepared according to the dimensions specified in ISO 354 or ASTM C423 standards.
• Place the sample on the floor or hang it on the test frame depending on the application of the test sample.

Step 2: Conducting measurement in the reverberation room

• The reverberation room of DASM is designed to meet international standards, ensuring optimal acoustic conditions.
• The microphone system and sound receiver will record the change in sound energy level with and without the test sample.

Step 3: Result analysis

• The collected data is analyzed to calculate the sound absorption coefficient at different frequency bands.
• Test results help clients clearly understand the sound absorption performance of products, thereby improving and optimizing materials.

Benefits of testing sound absorption coefficient at DASM Institute

Quality assurance and product optimization

Accurately measuring the sound absorption coefficient helps businesses evaluate and improve material design, enhance sound absorption performance, reduce noise, and optimize product features.

Supporting international standard certification

The test results of DASM Institute have high value in the construction, interior, and acoustic technology industries. Businesses can use this data to certify product quality according to international standards, creating a competitive advantage in the market.

Helping control and improve construction quality

For construction projects, checking the sound absorption coefficient helps architects and acoustic engineers optimize spatial design, reduce echoes and reverberation, and improve the quality of living and working environments.

Applications of sound absorption coefficient testing

The sound absorption coefficient measurement service at DASM Institute serves many fields, including:

• Interior design & architecture: Optimizing sound-absorbing materials for offices, hotels, theaters, and meeting rooms.
• Production of sound insulation materials & sound absorption materials: Evaluating product quality before commercialization.
• Automotive & aerospace industry: Testing the sound absorption capacity of materials in vehicle cabins and aircraft.
• Professional audio systems: Supporting the design of recording studios, theaters, and conference centers.

Why choose the sound absorption coefficient measurement service at DASM institute?

🔹 VILAS-standard laboratory – Ensuring accuracy and prestige.
🔹 Modern equipment system – Meeting international standards ISO 354 & ASTM C423.
🔹 Years of experience in acoustics – Supporting in-depth technical consultation.
🔹 Fast testing time – Helping businesses optimize production processes.

Do you need to measure the sound absorption coefficient for your products? Contact DASM Institute immediately for quick and accurate consultation and support!