Subacoustech has been a company offering specialist research and consultancy into underwater noise and its effects since 1992. During that period the company has developed advanced techniques for measuring and interpreting underwater noise, and has used them to take measurements of underwater noise and provide interpretations of them for a wide range of organizations spanning the offshore construction industry, oil and gas producers, the underwater blasting industry and defence. Its database of measurements of underwater noise currently runs to some 300 Gbytes of information and many thousands of individual recordings of hundreds of sources of noise. Research and consultancy companies such as Subacoustech operate under conditions of commercial confidentiality, and hence much of the information that is gleaned in the course of such work remains “grey literature”, with at most a limited circulation of reports and, at least, the information remaining confidential to the client. This is often contrary to the best interests of the industry, where free exchange of information can lead to benefits to all. The purpose of this report is to draw together much of the information Subacoustech has, and to provide a summary and interpretation of this, such that the information can be readily used.
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