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Survey and Measurement of Underwater Noise and Submarine Vibrations

Underwater Noise and Submarine Vibrations

In recent years, more artificial noise and vibration underwater is being generated by extensive work in fields such as marine development, harbor development and offshore wind farms, as well as by expanded maritime transportation. The impacts on the underwater sound environment and marine wildlife are thus of great concern, with special attention paid to underwater environmental surveys, just as with our atmosphere. With a wide range of practical experience with underwater noise and submarine vibration, INC provides the optimal plan for an accurate survey. Our experience includes:

水中音・海底振動

Survey Methods

Underwater noise surveys are conducted by selecting suitable spots, method and equipment according to the characteristics of the target sound source and local conditions

水中音・海底振動調査の例

Sample survey on underwater noise and submarine vibration

Underwater Sound Pressure Levels

The sound pressure levels for natural background noises differ from those caused by underwater construction, commercial vessels and other artificial noises. Typical examples are given in the following figure. (Levels will vary naturally with meteorological conditions, hydrographic conditions, distance and other factors.)

様々な水中の音
Various underwater noises
  • ※The standard value of 0 dB is 1 μPa for underwater sound pressure level. Care must be taken when comparing underwater sound pressure levels to air sound pressure levels, where 0 dB is 20 μPa.
  • ※Reference: “Sound Environment and Control Technology, Vol, II: Application Technology”

Analysis of Underwater Noise

We use appropriate analytical methods accounting for the objectives of survey, characteristics of the target noise and other factors in order to obtain accurate results.



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