ASSIGNMENT

3 Empirical and numerical estimation of room acoustic properties

Document all your work in your post on the course website.

During this exercise, you will become familiar with simple room acoustic estimations and the tools for them. Additionally, you will document the rooms by generating a simple impulse response for each of the three rooms, using free software tools and your notebook/personal device.

Task 1

  • Record a few sounds using audacity and play them back again (using a headphone or the speakers of your notebook).
  • Record a few clapping sounds in one to two of your three  rooms. Make sure that you are in a distance of approx. 1-2 meters to the recording device. Make sure that the individual claps do not overlap (if the reverberation time is very long).
  • Try to guess the reverberation time RT60 which you recorded as ‘room response’ of your claps.
  • Post a screenshot of your estimation and the numerical values for
    1 to 2 of your three rooms.
  • Are there echoes visible in the impulse decay (they show up as discreet late peaks)?

Task 2

  • Try to estimate the reverberation time at 500 and 1000 Hz using the online calculator on Sengpiel’s websites

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Architectural Acoustics

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