The STAR SHIP Seawolf (SSN-575)

It's often said that, 'The more things change, the more they stay the same.'

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The SSN 575 boat's EY circuit was the only circuit of its kind (AN/ASH-19) installed on a nuclear submarine. The system survived 30 years.

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Scientifically, certain female voices inject just the right element of urgency into their calm, controlled, clearly annunciated announcements to wake up any male in an instant.

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Today, female voice alarms are in more widespread use on trains, planes and even in automobiles.

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You can hear the actual submarine EY circuit voice warning alarms here.

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You can hear find Majel Barret's computer voice on STAR TREK in prequels to Enterprise.

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Plus, you can see and hear examples of Patricia Hoyt's cockpit warnings in this 1-minute video. She confesses being "Bitchin' Betty".

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Submarines are always silent and strange.