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 Technical
Notes
Here you can find a growing collection
of technical notes and papers describing practical uses of our products. If you
have a suggestion for a technical note, please let
us know.
TN001
- Measuring Impulse Responses Using Dirac
This is an introduction to using Dirac. The first part of this
technical note introduces some of the theoretical background of Dirac.
The second part illustrates the practical use of Dirac.
TN002
- Measuring
Speech Intelligibility Using Dirac
Starting from basic principles,
this technical note introduces the parameters used in speech
intelligibility measurements such as STI and RASTI. It also describes
the hardware needed for successful measurements, calibration
requirements and hints on how to handle common measurement situations.
TN003
- Using the Digital Input of the Digigram VXpocket
The Digigram VXpocket is a high quality PCMCIA
sound device, which
gives excellent results when used with Dirac. Due to incompatibilities
between the VXpocket driver software and Dirac, it is not possible to
calibrate the digital input of the VXpocket. This technical note
describes a procedure that will allow you to use the digital input as
if it were calibrated.
TN004
- G From Imported Room Responses
How to use Dirac to calculate
the sound strength G from impulse responses that were not measured
using Dirac.
TN005
- Practical Tips And Hints For Dirac
This technical note
intends to clarify where you should pay special attention before and
during a measurement session, what problems
may occur and how you can avoid or solve these.
TN006
- Insulation Measurements Using Dirac
Methods are described to measure
the airborne sound insulation, e.g. between two rooms. Dirac is used to
measure the relative sound levels as well as the reverberation time.
TN007
- Impulse To Noise Ratio INR
Describes the INR parameter,
which represents the decay range of an impulse response. The INR can be
used to qualify acoustical impulse response measurements.
TN008
- Dirac Stimuli
The Dirac product CD contains a
number of sound files that can be used as external stimuli in
asynchronous (open-loop) measurements. This technical note describes
these files and their use.
Papers:
MP3
stimuli in room acoustics
Presented at the 19th
international congress on acoustics, ICA 2007, in Madrid.
Effect of stimulus speed
error on measured room
acoustic parameters
Presented at the 19th
international congress on acoustics, ICA 2007, in Madrid.
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