Ambient TC4013 - Handbuch (Seite 18)

Maritime life fills the underwater world with countless interesting
sounds.
Due to the particular acoustic characteristics of that medium, it has
been impossible to make high quality multi channel recordings
under water - until now.
After two years of research Sonar Surround has succeeded in
developing a new awarded and patented technique to give
omnidirectional hydrophones a polar pattern close to a supercardi-
oid. Thus audio engineers now have the possibility to utilize
aproved recording techniques even underwater.
S
ONAR
S
URROUND
Underwater-Recording-Solutions
Being close to the human head shape spherical microphones are
known for their natural, “humanly” sound perception especially
pronounced with multichannel arrays.
By directing the hydrophone in a mainly additive way most interferen-
ces can be avoided.
Standard sizes of the Sonar Surround RS are carefully selected to offer a
directivity unprecetented with hydrophones and a natural sound stage
with harmonic sound even from the off-axis. However it would be
possible to realize directivity corner frequencies as low as 100 Hz with
customizing the diameter of the spheres.
The Directivity Spheres are manufactured with special PE-HD material
which can withstand a water depth of at least 1000m without altering
its acoustic behaviour. The complete fabrication process has been
tested and certified by the accredited GL (Germanischer Lloyd) to
ensure reliability.
A modular design allows the use with most common hydrophones.
However, for best recording results special hydrophones engineered in
cooperation with the global market leader Reson are available through
Ambient Recording.
Ambient Recording GmbH
Schleissheimer Str. 181 c
D-80797 Munich
Germany
Tel: +49 89 360 55 10 - 0
Fax: +49 89 651 85 58
Email: [email protected]
www.ambient.de
Sonar Surround Directivity Sphere
Sound characteristics:
Polar Pattern 20cm RS *
Polar Pattern 30cm RS *
* measured with airborne sound; calculated for 1500m/s sound velocity