What is Acoustic Walling?
The following provides information on the requirements for sound absorption in sports halls, gymnasia, dance studios and other normally unfurnished activity spaces.
For more specific information on the Dynamik Acousting Walling please visit the product page here.
Relevant guidance is provided in the following publications:
- Building Bulletin 93: Acoustic design of schools – Education Funding Agency & Department for Education, Feb. 2015
- Acoustics of Schools: A design guide – Institute of Acoustics (IOA) & the Association of Noise Consultants (ANC), Nov. 2015
- Affordable Sports Halls – Sport England, Jul. 2015
Aim Of The Performance Standard & Regulations
The overall objective of the performance standard is to ensure that the design and construction of school buildings provide acoustic conditions that enable effective teaching and learning.
It is now accepted that noise and poor acoustic design have a detrimental effect on pupils’ academic performance and teachers’ vocal health. Pupils with additional learning needs and hearing impaired pupils are particularly susceptible to the negative effects of poor acoustic design.
Practically speaking this means reverberation time (Tmf) which is set out in the below table for different room types.
|Type of Room||New build (Seconds)||Refurbishment (Seconds)|
|Indoor Sports Hall (>530m2)||≤ 1.5 – 2.0||≤ 2.0|
|Assembly/Multi-Purpose Hall||0.8 – 1.2||0.8 – 1.5|
|Gymnasium/Activity Studio||≤1.5||≤ 2.0|
What Do We Mean By Reverberation Time?
Reverberation time is one of the key determinants of room acoustic quality, and the factor to control with regard to sound absorption. It is the time it takes for a sound to reduce by 60db within a given space. It is measured at different frequencies since certain frequency ranges are more important than others.
How Can We Control Reverberation And Its Classification?
Typically reverberation is controlled by introducing sound absorbing surfaces. More effective absorbers and increased coverage within a room will lead to lower reverberation times. The amount of sound energy a material will absorb is known as the absorption coefficient.
The absorption coefficient for Dynamik acoustic panels is Class C over the frequency range of 500Hz to 2000Hz.
Once the size of a room is known and the absorption characteristics of the finishes within the room an acoustician can predict the reverberation time. An acoustic consultant can then calculate the amount of sound absorbing material to be included within a room based on the class of material specified but also to meet a particular room’s usage and a designer’s preference.
We have experience of working with acousticians to achieve a practical workable solution.
Simplistically sound absorption should be distributed within a room with a minimum of 25% from the walls, 30% from the soffit and the remaining 45% provided by finishes on any of the room surfaces. It is however beneficial for the sound absorption materials to be installed at a lower level rather than higher to improve their effectiveness.
Technical information on the Dynamik Acoustic Sports Wall is detailed below. The acoustic panels can be combined with matching solid panels of similar dimensions.
Standard Panel Sizes
2,450mm length by 600mm height and 15mm depth.
Alternative Panel Sizes
Available in a lengths of 1,225mm and heights of 1,200mm, 400mm or 300mm.
To European Class D (National Class 3) as standard but can be rated to European Class C (National Class 1) for a premium to satisfy the fire regulation requirements for a particular area.
11.3 kg/m2 – Non-perforated panel / 9.5 kg/m2 – Perforated panel.
Acoustic Panel Perforations
Precision cut 8mm perforations with a 16mm aligned spacing.
Each panel has pre-routed edges to allow for hidden fixings with a 7mm gap. A special bracket is supplied for this purpose. The panels can be fitted to vertical beams be they timber or metal at 491mm centres below 2.2m and at 614mm centres above 2.2m.
A black acoustic textile is fitted in front of the vertical beams, this effectively hides the gap between the panels and makes the black metal brackets appear to be “invisible”.
To achieve the sound absorption a mineral wool may need to be installed between the vertical beams this will be recommended by an acoustician.