Discussion Overview
The discussion revolves around converting Power Spectral Density (PSD) measurements from an underwater hydrophone into equivalent underwater sound pressure levels. The focus includes the implications of measurement techniques, the appropriateness of using PSD for single frequency measurements, and the necessary considerations for bandwidth in the conversion process.
Discussion Character
- Technical explanation
- Debate/contested
- Mathematical reasoning
Main Points Raised
- One participant states the hydrophone has a known receive sensitivity and provides a PSD measurement, seeking assistance in conversion to underwater sound pressure level.
- Another participant argues that PSD is not appropriate for single frequency measurements and suggests that only voltage should be measured instead.
- A different participant notes that if the signal is noise-like, the total bandwidth of the electronics must be considered for accurate conversion.
- One participant proposes that with a narrow resolution bandwidth, the PSD can be converted to voltage by multiplying by the square root of the bandwidth, although they acknowledge the complexity of the situation and the need for phase information for a complete analysis.
- The same participant corrects themselves regarding the mathematical expression used in the conversion process, indicating a potential misunderstanding in their initial explanation.
Areas of Agreement / Disagreement
Participants express differing views on the appropriateness of using PSD for the measurements in question, with some advocating for its use under specific conditions while others contest its relevance for single frequency signals. The discussion remains unresolved regarding the best approach for conversion.
Contextual Notes
There are limitations regarding the assumptions made about the nature of the signal (noise-like vs. single frequency) and the dependence on the bandwidth of the measurement, which may affect the conversion process.