The acoustic principle
The air mass is moved by vibration and sound energy. The frequency indicates the number of air movements per second. This number is expressed in Hertz (Hz).
3 levels are recognised:
- low tones: 100-400 Hz
- medium tones: 400 – 1800Hz
- high tones: 1800 – 5600 Hz
The volume is expressed in decibels (dB). The acoustic characteristics of Lambri panels have been tested according to international standards. By means of an experimental set-up the sound absorption is measured at various frequencies.
We can speak of acoustic comfort, when the background noise can be muted to the maximum, while the voice transfer is ideal in a short distance. To achieve this, the reverberation time has to be governed by a right combination of sound absorption and sound reflection. Wood veneer acoustic panels without perforation or slots reflect sound and light.
After editing with computer-controlled machines many acoustic models with different sound-absorbing properties arise. By use of an acoustic membrane, the desired reverberation time is reached. In combination with rock wool insulation material the acoustic insulation is also improved.
Absorption of sound
The degree of sound absorption can be read in the alpha value; The higher the value, the better the absorption of the sound energy. The alpha value is influenced by the distance to the architectural partition or ceiling the alpha value is reflected in a diagram per panel type. Also, the mean absorbency value is indicated. Download the brochure for the alpha value for the product of choice.