The advent of computer simulation and visualisation techniques for acoustic design and analysis has made room acoustics prediction very much easier. The range of parameters which contribute to excellent acoustics in auditoria is now large: as well as Reverberation Time, we consider Early Decay Time, Early to Late Energy Ratio, Clarity, Lateral Energy Fraction, Room Gain and Speech Intelligibility. The balancing of these parameters is a subtle process and is based on experience of listening to and measuring completed auditoria. Each hall will have a slightly different “signature”. We have modelled a large number of auditoria and results obtained during commissioning have shown an accurate correlation between prediction and actual results.
Due to the advances in computer technology we are now able to offers clients the ability to hear their auditoria before it is built using acoustic modelling software and Ambisonics convolution in our in-house 3D sound studio. Impulse responses can be taken from the computer model output and played back on a multi speaker array through a 20+ channel system to exhibit the acoustic properties of the model.It is possible for a client to hear what a source on stage will sound like in different seats in different acoustical conditions, i.e. Musical, Drama, Opera etc.This gives both ourselves and the client great insight into the expected performance of any given space.It is also now possible for us to auralise transmission into buildings with and without isolation to give the client a better understanding of noise pollution in sensitive areas and the advantages of acoustic isolation.
Internal acoustics is the study of sound propagation within building structures. Each building element is required to meet specific noise insulation standards, such as party walls, floors, glazing, cladding, acoustic doors. We can also impact on mechanical design elements with advice on innovative passive ventilation strategies to reduce both costs and energy usage.
Using Cadna-A noise modelling software it is possible to model landscapes to detect the propagation of sound through a site from any given noise source. Applications range from rail or road traffic noise through to school playgrounds. The software we use enables us to predict noise levels at problem locations and determine strategies to counteract any potential complaints and meet the required standards.
Vibration acoustics is the study of sound propagation through structures. The main areas of concern are re-radiated noise levels caused by vibrating structures and noise propagation from construction sites. As a structure vibrates it acts as a loudspeaker creating a sound radiating surface. By conducting surveys and analysing data using noise prediction methods it is possible to determine the necessary level of vibration isolation required to ensure that noise level on sites built close to railways, motorways etc. meet the required standards.Solutions are often found using resilient constructions such as isolated buildings, sprung concrete slabs or resilient wall/ceiling linings.