New
Solution for Room Acoustics Optimization
The acoustic characteristics of a room
must be suitable for the purpose of the room. In classrooms, for
example, a short reverberation time is a prerequisite for good
speech intelligibility, whereas for a piano sonata in a concert
hall, a longer reverberation time is more effective for a pleasant
acoustic sound.
These common examples show how
essential it is to adjust the reverberation time of a room to suit
the planned application. The new “Room Acoustics Reporter“ PC
software from NTi Audio, in combination with the DS3 Dodecahedron
Speaker and the XL2 Sound Level Meter provides the perfect solution
for reverberation time optimization calculations and comprehensive
reporting according to ISO 3382 and DIN 18041.
The reverberation time of a room is one of the most important
parameters in room acoustics. The intended use of the room
determines the reverberation time requirements. In a classroom, for
example, depending on the size of the room, reverberation time
should be between 0.5 and 1.0 seconds in order to achieve good
speech intelligibility. This is often not the case, particularly in
old school buildings, due to a lack of absorbing materials. In a
concert hall, a reverberation time of between two and three seconds
is desired to create a warm and rich listening experience.
Powerful DS3 Sound Source For
standard-compliant reverberation time measurements, a sound source
with omnidirectional characteristics is needed. The sound energy
must be radiated uniformly in all directions. The current building
acoustics standards also require a flat frequency spectrum in the
relevant frequency range. The DS3 Dodecahedron Loudspeaker fulfills
these requirements while delivering high sound power and thus
provides a perfect excitation signal for reverberation time
measurements.
Measurement of the Reverberation Time with the
XL2 If a reverberation time measurement is required in
1/3rd octave resolution, the "Extended Acoustic Pack" Option can be
installed onto the XL2 at any time. The XL2 automatically triggers
on an impulse sound source or a gated pink noise. When recording the
reverberation times, it is possible to switch between T20 and T30;
these two types of analysis differ in the level reduction required
to trigger a measurement.
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