Acoustics: Signal Processing

Spectral & Temporal Analysis

Meaningful and efficient analysis of acoustic and vibration data requires that the best use be made of processing techniques in both the time and frequency domain, depending on the nature of the phenomenon being studied and the parameters under investigation. Digital filtering of an acquired time series, for example, can be achieved by either temporal or spectral processing methods - and there are specific advantages and pitfalls to either which must be fully understood to guide the analyst. Often a less than optimal choice may be made only because the computational packages available or the traditionally adopted approach sway the selection in favour of a standardized path.

At JASCO Research we have the processing tools, knowledge and experience that permit us to freely adopt the most advantageous pathway to the answers that are sought, using whatever combination of methods we consider best for the particular problem at hand, and not in a generalized context. In past projects that have ranged from participation in global-scale time of travel measurements for underwater sound over thousands of kilometres to development of full-wave correlation methods for directional location of an acoustic source in a noisy and distorting propagation environment, our capabilities for assessing - and sometimes devising - the best processing approach to adopt have given us a significant edge.

Whether it be a traditional acoustic processing task to be handled in a more effective way, or a hitherto untackled sound or vibration analysis problem for which a solution must be sought, our team will use with confidence the full range of available mathematical methods in the time and frequency domain to ensure a truly optimal outcome.

Detection & Localization of Sound Sources  JASCO's acoustics team has extensive experience in the detection and localization of sound sources in air and underwater. We have developed methods of sound detection through ambient noise using advanced beamforming techniques, and have used triangulation and line arrays for the localaization of sound sources in three dimensions. Examples of these techniques include three dimensional fish-mounted transponder tracking and voice detection and amplification,  and localization techniques designed to determine the location of people at sea.

Transducer Array Technologies JASCO’s engineering team provides development services for underwater acoustics instrumentation. We have developed systems for many purposes including underwater listening, fish tracking, noise monitoring, seismic exploration, and surveillance. Our in-house programming team works closely with our engineers and scientists to produce highly sophisticated solutions to complex acoustic system development requirements.