Acoustic Treatment for Listening Rooms: International Standard Solutions from DASM Institute

DASM – the expert in listening room acoustic treatment according to international standards. Acoustic measurement, resonance control, sound insulation design, intensive sound absorption and diffusion, bringing top-level sound experience to customers.

In the audio world, many people invest hundreds of millions of VND in high-end speaker and amplifier systems, but still fail to achieve the desired sound quality. The cause lies not in the equipment, but in the fact that customers have not treated the listening room acoustics, nor used appropriate sound insulation, sound absorption and diffusion materials.

Listening room acoustics is the fundamental factor determining the quality of the experience. A good sound system is hard to fully perform if the space has not been standardly treated.

With deep knowledge, practical experience, and a VILAS-standard laboratory, DASM Institute – the Institute of Acoustic Materials Development & Application brings international-standard listening room acoustic treatment solutions, based on precise measurement science.

Basic concepts in listening room acoustic treatment

Direct sound

Sound waves traveling straight from the source (speakers, instruments) to the listener's ear without reflection. This is an important factor creating clarity and fidelity.

Reflected sound

Sound waves bouncing back from walls, ceiling, floor, or objects in the room. If uncontrolled, they cause echoes, bass boom, or loss of detail.

Sound absorption

Using soft, porous sound absorption materials (mineral wool, fiberglass, acoustic foam, acoustic wood, etc.) to absorb sound energy, reducing echoes and reverberation.

Diffusion

Using convex and concave surfaces (diffusers) to scatter sound waves. This technique helps sound become natural, even, and not concentrated at a single point.

Resonance & standing waves

A common phenomenon in the low-frequency range, causing the bass to be boomy, thick, and muddy. This is the biggest problem in untreated listening rooms.

Common acoustic issues in listening rooms

Echo / reverberation: caused by hard and parallel surfaces reflecting sound multiple times.

Boomy, heavy bass: caused by low-frequency standing waves accumulating in room corners.

Unnatural sound: if the room only uses sound absorption materials without diffusion, making the sound dry and losing liveliness.

Acoustic imbalance: high frequencies are absorbed too much, while low frequencies are not yet controlled.

Listening room acoustic treatment solutions

+ Intensive acoustic survey & measurement

DASM uses modern acoustic measuring equipment, analyzing frequency response, reverberation time (RT60), standing wave distribution, etc., to provide precise solutions for each space.

+ Control of low-frequency resonance & standing waves

Bass traps in room corners to absorb low-frequency energy.

Designing specialized sound absorption materials for low frequencies.

+ Balanced sound absorption and diffusion

Installing sound absorption materials at first reflection points.

Using diffusers behind the listening position or behind the speakers to scatter sound.

Ensuring harmony: using too much sound absorption material will make the sound "dead", and room surfaces should not have large reflective areas causing echoes.

+ Optimizing speaker placement & listening position

Speakers should be placed a certain distance from walls to reduce reflections.

The seating position should avoid being close to the rear wall or right at strong standing wave points.

+ International-standard architectural acoustic design

DASM consults and designs architectural acoustics standardly according to the function and customer needs: hi-fi listening rooms, home theaters, professional recording studios, broadcast studios, etc.

Why choose DASM?

Leading acoustic research institute in Vietnam

VILAS laboratory – ensuring scientific rigor and accuracy in measurement

Experienced team of acoustic experts

Comprehensive solutions: from survey, measurement, consultation to design and acceptance

International standards – tailored to Vietnam's specific characteristics

Listening room acoustic treatment is an important step to optimize the sound system. Not stopping at reducing echoes or handling booming sounds, listening room acoustics also brings a balanced, faithful, and natural space for enjoying music, movies, and entertainment.