The acoustical environment of a building is given little attention during project planning and design stages. While developers and contractors spend an inordinate amount of time brainstorming the functionality and aesthetics of the premises, focus is shifted away from this critical element. Providing a comfortable environment for employees as well as home owners has a significant impact on their quality of work and life and creating such an environment depends on a variety of factors, such as electric lighting, indoor environmental quality, temperature, and acoustics. Excessive noise inside a building can come from traffic outside, mechanical equipment in adjacent spaces, as well as voices and musical instruments within the property.
While a satisfactory indoor acoustical environment starts by assessing the construction site before any development works have taken place to determine the expected levels of noise, there a few things that can improve the structure of the building and minimize sound penetration.
Windows and glazing are very important elements of the building envelope. They must allow daylight to enter the premises while rejecting heat and glare and control sound. The extent of windows and glazing, and their size and location are customized based on client requirements and structural needs and need to be made in the project concept phase.
This involves defining criteria and requirements, such as reverberation time, STI, RASTI, definition, lateral efficiency, clarity, noise spreading etc. to control specific characteristics (reverberation times, RASTI, Clarity, Deutlichkeit etc.), and running 3D simulations of rooms based on the spread of acoustic parameters to determine ideal locations for loudspeakers. A 3D model is then built to present the sound distribution around sources using 3D simulation, which allows for sound-absorbing surfaces or screens to be optimized and the best sound-absorbing materials chosen.
These measurements can be executed on or off-site in accordance with the laws and regulations: control and performance measurements, spectral, statistical, excess levels, duration of excess level, intensity measurements, measurements of sound pressure level (NR, dB(A), dB), airborne noise insulation measurements, impact noise insulation measurements, facade insulation measurements, room acoustic measurements (impulse response, speech intelligibility, STI, RASTI, reverberation time, sound distribution, lateral efficiency, clarity, definition etc.), vibration monitoring, continuous and statistical sound measurements (LAeq, LA95, LA05, SEL etc.), leak detection, noise monitoring, spectral analyses (1/1, 1/3 to narrowband), vibration measurements, modal analysis and sound transmission.
Acoustical exhaust silencers and sound enclosures can be designed for rooftop fans that generate elevated environmental noise levels in certain locations. United Builders Service identifies specific equipment that may generate excessive noise level through acoustical measurements and analysis, we proceed to design a noise abatement system to meet local noise ordinances, furnish and install noise control systems, and measure sound levels afterwards to confirm compliance with the applicable noise ordinance.