This concerns controlling the acoustics of a room with electroacoustics and electronics. Active acoustics can cure certain defects of the room, and achieve acoustic variability. Thus, the user can adapt the acoustics to the requirements of each type of program.
This technique appeared around 1965, initially aiming at lengthening the reverberation time so that concerts could be performed in good acoustical conditions.
With the development of digital signal processors (DSP), several active systems were proposed, implementing sophisticated signal processing, and capable of controlling other aspects of the acoustics such as direct sound reinforcement.
At the touch of a button, the user selects the acoustics which fits each type of performance: Theatre, Opera, Symphonic, Jazz, Conference,… Listeners have the impression of natural acoustics. They must not detect the presence of the active system. With the active technique, one can obtain much greater and more flexible acoustic variability than that achievable by passive means.
With the active technique, one can obtain much greater and more flexible acoustic variability than that achievable by passive means.
Active acoustics should not be confused with traditional sound reinforcement, with which the listener is aware of the presence of a sound system.
- Active acoustics allow a room manager to optimize the exploitation of his facility.
- It provides acoustical comfort to the users (both in the room and on stage).
- It is also a means to relieve architects and acousticians from certain acoustical constraints. For example, a geometry or a type of material which would not provide the necessary acoustical reflections can be compensated for by an active system.
Active Audio helps you to prescribe and choose a system
Active Audio engineers have extensive experience of active acoustics systems. They put their means and knowledge at your service:
- Informations on existing systems
- Analysis of your needs and drafting of specifications
- Assistance in choosing a suitable system
- Characterization of results
- Training of operating staff
Active Sound Reflector (ASR) Simulator
Turn on the sound on your computer, and come play with the Active Reflector !
The simulator needs the Flash plug-in. If your computer doesn’t have it, you’ll be offered to download it (free).
This interactive simulator illustrates the functioning of the active sound reflectors used in active systems.