What is the meaning of Sounder?

comparative form of sound: more sound

Something or someone who makes a sound.

An instrument used in telegraphy in place of a register, the communications being read by sound.

A stethoscope.

Synonym of sting (“brief musical sequence in television etc.”).

A device for making soundings at sea.

A person who takes soundings.

A fishfinder.

A group of wild boar.

A young boar.

alternative form of soundre

Source: wiktionary.org