Kongsberg Simrad MF90, Installation Manual

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68
476671/B
Acoustic noise
Topics
Introduction to the acoustic noise challenge, page 68
Contributing factors, page 68
Self noise, page 70
Ambient noise, page 73
Electrical self noise, page 73
Reverberation, page 74
Some means to reduce acoustic noise, page 75
Introduction to the acoustic noise challenge
Even with the advanced noise filtering offered by the sonar system, we must address the
noise challenge. This is important during the planning and preparations for the system
installation. The echoes from any large and small target must be detected inside the noise.
It is important that we keep the noise level as low as possible. This is necessary to obtain
long range and dependable interpretations of the echoes.
Related topics
Preparations, page 42
Acoustic noise, page 68
Contributing factors
Several factors are contributing to the performance of the hydroacoustic equipment used
on board a vessel.
Factors contributing to the performance of the hydroacoustic equipment used on board a
vessel are:
• The quality and properties of the transmitted signal
• The quality of the receiving system
• The operational settings made during operation
Simrad MF90 Installation Manual