© 2018 Doppler Consulting

Doppler Consulting



Acoustic Consultants Durban

Architectural Acoustics

The science of sound in the built environment.

Architectural acoustics refers to acoustics in the built environment. We work with architects, building owners, facilities directors, and technical directors and encourage our involvement in the design and pre-construction phases. With early involvement, we can develop acoustics and AV solutions for construction drawings and help shape environments and systems for desired acoustical performance. Our clients know that a small investment up front helps prevent costly acoustical remediation on the back-end.

Every project is different and usually requires a review of the proposed design including construction methods, facade construction, mechanical ducted systems, generator plant rooms, proposed activities in all spaces, and internal finishes. The acoustical design criteria is based on local SABS and international standards. Typical criteria include sound insulation value (Rw), sound impact insulation value (Ln,T,w), indoor ambient noise level rating (LReq), noise rating (NR), reverberation time (RT60) and speech transmissibility index (STI). Should any standard or regulation not be met in the review, further acoustical engineering analysis and design methods are employed to bring the relevant areas into standard compliance by discussing with the client the best way to go about it taking construction methods, building materials, building system designs, and available technologies and products into account to achieve the requirements.

Environmental Acoustics

The science of sound in the environment.

Environmental acoustics refers to acoustics or noise in the outdoor environment. We measure, analyze, and assess noise control problems and provide expert recommendations to control and isolate noise. We work with architects, engineers, building owners, and facilities managers on a wide range of indoor and outdoor acoustics and noise control challenges, from simple to complex, for architectural, industrial, and environmental spaces. Due to building systems such as mechanical and electrical generator plants often exhibiting inherent noise problems to the served building and adjacent noise sensitive properties, architectural and environmental acoustics can often overlap.

We provide analysis and assessments, both predictive (such as noise impact studies that can be used as the baseline for mitigation design) and in-situ (noise monitoring & measurement, noise nuisance studies and legal cases) according to local noise regulations and SABS standards. 

AV System Design

Integrated sound system design & room acoustics

Any audio system must be matched to the environment in which it is placed. Put another way, the environment must be conditioned purposefully to ensure the intended audio system performs at it's optimum. In fact all audio system specifications and parameters such as frequency response range and directivity, whether for small home studios or multiple line array module installation, are acquired from laboratory controlled acoustic environments. Even modern DSP software supplied with new systems can only help so much. Chat to any audio professional and they will tell you without a doubt that the room is the most influential 'black box' in the audio signal chain. We have never heard of, and never will hear of any professional post-production or critical listening facility that employs only DSP algorithms to achieve the desired rooms' response.

As AV design consultants we can model a room design on a computer and even auralize (hear) the expected outcome of a specific sound system in a specific room environment, in any listening position, all prior to any expenditure. Design criteria include reverberation time (RT60), speech transmissibility index (STI / STIPA), ambient noise level rating (LReq), sound insulation value (Rw), clarity (C50, 80) and direct vs reverberant field level ratio (C/R).