What is the laser sound in the tunnel?
In Dr. No when James Bond escapes his cell (through the electric fence) he is in a tunnel, climbing down, when suddenly there's what sounds like a laser (it sounded like a Sonar signal)
He looks up, but there's nothing there.
What is the noise exactly, and what caused it?
Best Answer
Those sounds appear to be pipe experiencing thermal expansion as well as the noises of the coolant valves opening and closing.
You may wish to note that the pipe is becoming uncomfortably hot (forcing James to fashion himself cloth mittens), then shortly after the metallic "ping" is heard, a wave of water comes rushing through the tunnel and nearly washes poor Mr Bond away. We then see water boiling and steaming on the metal walls of the tunnel.
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Sending Sound on a Laser! - The Science of Telecommunication with Mr. G - Part 3
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