Standard laboratory test method for determining fan noise

Material testing Determination of fan sound power levels under standardized laboratory conditions provides useful information to identify priority noise control measures, production – efficient product improvement…

Overview of the material testing Determination of fan sound power levels under standardized laboratory conditions

Test name: Determination of fan sound power levels under standardized laboratory conditions.

Test method: ISO 13347-2:2004: Acoustics – Determination of fan sound power levels under standardized laboratory conditions – Part 2: Reverberant room method [1].

Performed at: Reverberation room, DASM Institute of Acoustic Materials Development & Application (DASM).

1. Objectives and test subjects

– Test objectives

Determine the noise generated by industrial fan operation using the reverberation room method.

>– Test subjects

Industrial fans.

According to the standard, the test setup diagram for determining the noise level of industrial fans is divided for centrifugal fans and axial fans.

2. Experimental procedure

Implementation steps:

• Equip fully with devices, microphones, and measurement samples.
• Perform sample measurement.
• Process and report results.

3. Notes

• Observers and operators should not remain in the test room during the measurement, but if strictly necessary, they must stay away from the sound source and remain in the same position throughout all measurements.
• The time interval used shall be sufficient to provide a constant value and be at least 30 seconds for frequency bands of 160Hz and below and 15 seconds for frequency bands of 200Hz and above.
• When a microphone is at several different positions (Figure 6, left) or a fixed microphone array is used, the microphone output observation time interval shall comply with the specifications of ISO 3743.
• If the cross-sectional area of the fan inlet or outlet is greater than 2m² (corresponding to a circular area of 1.6m), duct methods, reverberant field methods, or enveloping surface methods may be used.

Role – importance of the test Determination of fan sound power levels under standardized laboratory conditions

The test Determination of fan sound power levels under standardized laboratory conditions performed by the DASM Institute of Acoustic Materials Development & Application helps provide useful information, meeting all practical needs of customers and enterprises wishing to:

• Control noise, isolate noise sources, prevent noise, and implement mitigation measures to avoid health and safety risks without adversely affecting the surrounding environment.

• Measure the working environment and assign appropriate job roles. Train workers exposed to a noisy environment to clearly understand the hazards of noise and safe working procedures.

• Control equipment status, detect signs and causes of damage early... to proactively maintain machinery.

• Material manufacturers, consulting – design units... of industrial fans aiming to achieve noise reduction, sound absorption, sound insulation...; evaluating the effectiveness of noise reduction measures.

• Assist in quality control during production, optimizing research and development of products and materials that help reduce noise, soundproof, absorb sound, and insulate sound... related to noise emitted by earthmoving machinery.

• Commercial/consulting businesses have a factual basis to propose and implement solutions prioritizing machinery, equipment, and technical-technological initiatives that are suitable and capable of minimizing the impact of noise.

• Support legal dispute issues, lawsuits, expert appraisals, and environmental sample measurement and analysis in cases of noise violations exceeding environmental technical regulations.

At the same time, DASM will conduct consulting and design work to create shape/structure/material solutions to efficiently and economically refine customer test samples (in case they do not meet standards).

If previously you had concerns and worries and had to pay many fees for similar activities abroad, now you only need to contact DASM. The entire remaining process will be proactively handled by us on a turnkey basis in the fastest time to complete your customer experience with us: DASM provides acoustic consulting services with truly superior quality, highly competitive prices in the industry, along with dedicated customer care policies.

Significance of acoustic testing services at DASM

Today's globalized commercial life opens up countless new markets and supply sources across five continents. Accompanied by this are international regulations and standards that help customers easily evaluate quality – trace product origins, and select suitable/superior items. In particular, they support manufacturers in continuously improving and perfecting technology, techniques, raw materials, production methods, sales... etc...

The DASM Institute of Acoustic Materials Development & Application is a pioneering, comprehensive, professional, and leading prestigious brand in Vietnam in the field of acoustics. On January 12, 2023, DASM was granted certificate No. 114/TĐC – HCHQ by the Directorate for Standards, Metrology and Quality (Ministry of Science and Technology), certifying registered multi-industry testing operations in the Mechanical-Physical field (registration number: 707/TN – TĐC).

Our acoustic testing services provide customers with practical professional results to meet sustainability, standard performance, and optimal design consulting and adjustment solutions for products and services. From there, you will update, meet, and adapt to constantly changing international standards to achieve breakthroughs in revenue, profit, and elevate your brand.

Customers in need of performing material testing for Determining fan noise under standard laboratory conditions please contact via Hotline for detailed consultation!