Abstract

A noise analysis is conducted on an interferometric sensor employed in the study of underwater acoustic noise. Primary emphasis is placed on finding the output Signal to Noise Ratio of the sensor.

Once the initial problem of the type of noise is established, the analysis proceeds along fairly classical lines. Field equations establish the signal reaching the director. Linear filter analysis establishes the nature of the spectrum after passing through a lowpass filter. Finally, second moment theory is used to derive expressions for the output Signal to Noise Ratio.

It is noted that the random ocean noise introduced to the filter randomly phase modulates the signal. This noise seriously affects the value of the Signal to Noise Ratio. It is hoped that the spectral analysis presented will assist designers in minimizing the noise input to the system. The sensor is more sensitive to low frequency acoustic signals such as would be encountered from distant ocean vessels. Regardless of the noise spectral density, these sensors can be used with relative confidence as under water Acoustic Hydrophones.

Notes

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Graduation Date

1986

Semester

Spring

Advisor

Phillips, Ronald L.

Degree

Master of Science (M.S.)

College

College of Engineering

Format

PDF

Pages

76 p.

Language

English

Rights

Public Domain

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

Identifier

DP0020352

Accessibility Status

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