Measurement System

ODEON has a powerful measurement system for measurements of real rooms. On top of ODEON itself, you will also need at least one speaker (in most cases omnidirectional) and a microphone. ODEON generates a sweep for the speaker, that is recorded in the room (or outside) and then recalculated into an impulse response. The Sine Sweep Method is the most effective way of measuring room acoustics while suppressing background noise, both from other sounds and the electronics themselves.

  • All editions have the measurements system
  • The Auditorium and Combined editions include the ability to make auralizations from measurements

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Measuring System in ODEON

A comprehensive introductory video on the ODEON Measuring system by Claus Lynge Christensen: How to make a measurement, how to process it and how to import measurement results to simulations.

(NOTE: THIS IS NOT THE NEWEST MEASURING SYSTEM. Updated video being made, but the basics are the same.) 

0:00​ Intro
0:31​ Measure impulse response
2:21​ View measured results
3:32​ Automatic onset and truncation times
4:48​ Parameters that require calibration
5:34​ Loading impulse responses
7:38​ Comparing measurements vs simulations
10:13​ Adding measurements to Multi-point job
11:40​ Reproducibility of results
14:00​ Outro

Two Step Sound Source Calibration

The two step calibration in ODEON makes it easier AND safer to calibrate the measurement system by adding a second step to the calibration in the laboratory and repeating this second step in-situ, just before performing the measurements.

0:00 Intro
0:39 Traditional calibration methods
2:12 Second step in calibration
3:51 Removing reflections from measurements
4:46 Generating 2-step calibration file
7:35 In-situ calibration
10:01 Applying calibration post-measurement
11:49 Convenience of 2-step calibration
13:05 Outro

Load and analyse impulse responses

If you possess the WAV file of an impulse response, even if it was obtained from outside of ODEON, you can load it into ODEON and derive the room acoustic parameters from it. You can even load multiple impulse responses at once for statistical results.

0:00 Intro
0:25 How to load an impulse response example
0:58 Onset time and truncation time
1:43 Viewing other octave bands
1:56 Performing snapshot measurements with a smartphone
2:37 Loading a series of hand claps in a single WAV file
2:50 Viewing decay curves
4:49 Viewing room acoustic parameters
5:46 Frequency response, cepstrum, and spectrogram
6:18 New “Play It!” feature for easy auralisation
7:49 Loading multiple impulse responses
8:36 Viewing individual and statistical results
11:14 Outro

Onset and Truncation Time

Although ODEON automatically detects the onset and truncation times in an impulse response, you may also have manual control on these parameters, which may be desirable in some instances.

0:00 Intro
0:16 Loading impulse response files
1:08 Manual onset time
1:49 Using handclaps for draft measurements
2:20 Parameters for different handclaps
3:11 Wrong automatic detection of onset
3:57 Manual correction of onset
4:41 Manual truncation time
6:35 Outro