None. A vessel underway under normal conditions does not need to make any sound signal.
If the vessel ceases to make way it still does not make a sound signal unless special circumstances apply.
breathing moving living blood pumping alive sounds
If the turn signals and emergency signals don't workout sounds like an electrical problem's would suggest that you take it into the closest shop to get the problem diagnosed properly.
A power-driven vessel under way sounds one prolonged blast not less than every two minutes. However if it is less than 12meters in length it is not required to give any signal.
they can hear sounds and turn them into electric signals
Data representation
To generate audio signals from digital signals received from Headphone's output voiceport on computer.
Carrier pigeons, smoke signals, animal sounds, mail, telegraphs. Hope this helps :)
Sounds like a watch to me
Erosion
Sounds like a bad connection or a bad relay.
sounds like a ground problem to me..
It is a short word for microphone, used in recording the actual sound. it changes sound waves into electrical signals.