project 257: Multiple audio channel reinforcement

Frans Ockeloen (Instituut voor Audio- en Belichtingstechniek)
Cees Mulder (Kahle Acoustics)

date and time:
Monday, October 1, 2018
19:00 - 20:00 coffee time
20:00 - 22:00 presentation

Royal Conservatory
Juliana van Stolberglaan 1
2595 CA Den Haag

Multiple audio channel reinforcement
When applying multiple audio channel reinforcement we do not mix microphone signals. Each microphone signal is fed to an individual loudspeaker, or set of loudspeakers. This way a larger gain (before feedback) is possible. Application of this method is found in the area of variable room acoustics and of sound reinforcement.

Room acoustics
Since we can think of a loudspeaker as an amount of negative absorption one can use this approach to electronically control the room acoustics. Adding ‘early reflections’ further enhances the acoustics. Comb filtering is minimised due to the acoustical mixing process.

Sound reinforcement
Recently multiple audio channel reinforcement has been applied in a touring theater show of Brigitte Kaandorp. Very often the sound systems were limited to a L/R array system. An LCR-system already offers more options. However an independent vocal system - e.g. via center cluster - is rarely available.

Cees Mulder will inform us on the theory behind multiple audio channel reinforcement and he will illustrate its application in room acoustics. A simple system for tuning room acoustics, with commonly available equipment, will be demonstrated. Frans Ockeloen will shed his light on the practical application for sound reinforcement and will demonstrate a comparison with standard L/R sound reproduction.

how to apply:
Participation is free of charge for AES members, non-members: € 10,- (students: free access)
Members of NAG, VCA and VPT can also participate free of charge.

how to get there:
The Royal Conservatory is situated at a walkable distance from the railway station 'Den Haag Centraal'. By car, arriving via A12, take exit 2 (Centrum). You will find the Conservatory at the end of the exit, after a right turn, immediately at your right hand side. For your convenience a map is provided at the bottom of this page.
On the Royal Conservatory website you will find more extensive route information.

Cees Mulder (see at bestuur)

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