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2018

Vijay Purandare
Auditorium Design & Acoustical Consultant

ACOUSTICS IN AUDITORIUM DESIGN.

In our part of the world that is in Indian sub-continent, majority of More

Less In our part of the world that is in Indian sub-continent, majority of performing auditoriums are designed considering drama as basic design parameter. Such an auditorium is a cultural hub or centre of a village or town and multiple hubs in big cities. Many educational institutes also build the auditoriums for cultural programs of students as well as for seminars and lectures. Almost all corporates are also having auditoriums at various locations mainly for presentations, seminars & occasional cultural programs. In classroom, one of the very basic & important element of school/ college design, where understanding the subject by students is the single most important goal, acoustics, unfortunately has last priority or practically neglected by the designers as well as school management. For all these applications, audio visual connection & communication between the performer & audience is a very important. In my opinion, success of any architectural design or beauty of interior aesthetics is nothing but how well it serves the purpose for which it is built for. Unfortunately, in many of the cases the purpose is missing. And especially when it comes to auditoriums, seminar halls or classrooms, it’s about acoustics. As written by Michael Barron: “Several auditoria exist around the world where a major world-class architect has wanted to create a great public monument, but the architecture gets in the way of an effective functioning of auditorium.”
In acoustical design, what we actually find is, majority of designs, not only in India but in many parts of the world, are more focused on (sometimes only focused on) control of reverberation time by use of absorbing materials ( Using only NRC figures for absorption calculations is another big mistake). Similarly the misunderstanding about audio system like just putting the best brand will solve all problems or one can increase as much volume as desired etc. This may be because

  1. 1. Misconception of many people that only applying soft or absorbing material is acoustics.
  2. 2. Reverberation is easier to calculate & predict.
  3. 3. In architectural college syllabus & teaching more pressure given on reverberation calculations.
  4. 4. Information about absorption coefficient (or just NRC) is readily available or bombarded by material suppliers.
  5. 5. Interior decoration attracts more importance than functional needs.
  6. 6. Sometimes international standards also focus more on Reverberation than actual performance or actual objective (as in the case of classrooms).
  7. 7. Misguided dependency on electronics & speaker system.
  8. 8. Tendency to expect free or cheap advice.
  9. 9. Misunderstandings about simulation softwares.

Our discussion here is to the acoustics in complete
  • Noise & S/N Ratio,
  • Reverberation time and its control
  • Role of diffusions in acoustical design,
  • Importance of acoustical reflections.
  • Relation of Audio system with Acoustics.
  • Limitations of Audio system.
With practical approach, along with many examples, slides data & photographs. Any good acoustical design should be near perfect combination of reflection, diffusion & absorption of sound energy, the designer or consultant should take extra efforts to plan for proper reflections as well as diffusion of sound field along with the absorption calculations. These extra efforts will always pay for long time to come, in terms of much better speech as well as musical experience for the audience and that also effectively reducing the cost & when applied to classrooms, it’s about the future of our Nation. V. N. Purandare


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For Speaking Opportunities or Booking
your Presentation Slot contact:

Smita Rai

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srai@palmexpo.in
+91 22 4286 3900
+91 982 094 3398

 

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