Sound Absorption

Whilst every room is different and we treat every project on its own individual merit, there are a few simple principles we work with to ensure the best level of acoustic comfort is achieved with every project we work on. Whilst not all the points below are possible on every project, we aim to meet as many of the requirements as possible.

  • Calculate how many square feet of coverage is required to get optimal acoustic comfort. There’s no need to cover every square inch of your room in acoustic materials – we calculate exactly what you need so that there is no waste when it comes to materials or your budget.
  • Choose quality materials and think about the lifecycle of your space – it’s better to cover less space in Class A materials than it is to cover everywhere is sub-standard materials. Ekous can achieve Class A rating depending on your preferred structure and budget.
  • Aim to cover a minimum of 1/3 of your space with sound absorbing materials for optimal results – our acoustic assessment can determine how much above this you will need to get the best result.
  • Spread out the acoustic treatments as much as possible – this ensures that sound absorbed from as many directions as possible.
  • A mixture of ceiling and wall panels/acoustic treatments are ideal. Again this ensures that sound is absorbed from different parts of the room and prevents echo.
  • Choosing the right acoustic product for the right room type – i.e. a boardroom would require high spec finish whilst a sports hall would require impact resistant materials. But using high impact panels in a boardroom would be unsuitable and vice versa.
  • Understand your room type and the role acoustics can play in a space. Some spaces need an element of liveliness about them. Absorbing too much sound can deaden the space and make it sound flat. In social spaces such as restaurants and in studios where the sound of a voice is key, it’s imperative to get the balance right between a room being too reverberant and too dry.

What is Reverberation Time (RT)?
Reverberation time is the most important factor when assessing a room with a noise problem. RT is defined as the time it takes, in seconds, for the sound pressure level to drop by 60dB after the source has stopped generating the sound. A room with a high RT generally has a problem with noise as sound travels for long distances without being absorbed. Rooms with a high RT almost always have an issue with echo as sound is reflected from hard surface to hard surface.

Our Guide to Reverberation Times
In the interior acoustics industry, there are surprisingly few guidelines regarding the levels of noise in different room environments.  After years of experience of working with in various noise problems, we now work within our own set of RT guidelines which enable us to assess and solve noise problems in a wide range of room types. The recommendations for RT in different room types are shown below.

Open Plan Office   < 1.0 second
Enclosed Office  < 0.6 second 
Meeting Room  0.6 – 0.8 second 
AV/VC Room  0.5 second 
Primary School Classroom  < 0.6 second 
Secondary School Classroom  < 0.8 second 
Nursery School Classroom  < 0.6 second 
Small Lecture Classroom  0.8 second 
Large Lecture Hall  < 1.0 second 
Assembly Hall  0.8 – 1.2 seconds 
Sports Hall  < 1.5 seconds 
School Corridor / Stairway  < 1.5 seconds 
Dining Room / Canteen  < 1.0 second 
Restaurant  < 1.0 second 
Church  1.5 seconds 
Library  < 1.0 second 
Swimming Pool  < 2.0 seconds 
Call Centre  0.8 second 
Theater / Auditorium  1.5 – 2.0 seconds 
Cinema  0.8 – 1.2 seconds 

Alternatively, you can visit to do an indication calculation of the reverberation time in a virtual room. Let the computer calculate how many Ekous products you need to get a good sound environment.

Acoustic Design & Consultancy

acoustic consultancyEkous is the 1st Asian manufacturer who has been tested and evaluated by 

With our experienced engineers and acoustician specialised in the field of acoustics we provide solutions for various projects.

As we work in accordance with international standards,, we urge to provide the best solution that focuses directly on customer needs and requirements.


Services includes :

  • Acoustic Design & Modelling
  • Acoustical Testing in accordance with ISO, EN Standards
  • Building Acoustics Measurements
  • Room to Room Sound Insulation Level Measurements
  • Façade, Wall and Slab Sound Insulation Level Measurements
  • Impact Noise Insulation
  • Noise Level Measurements (SPL)
  • Noise Measurements for Occupational Safety and Health
  • Environmental Noise Surveys
  • Reverberation Time and Room Acoustics Measurements
  • Sound Power Level Measurements for Machinery
  • Frequency Analysis
  • Reporting

Please contact us for more information about professional engagement consultancy services.