there isn't one set in stone but the human ear picks up higher sounds easier so it sounds like trumpets are loudest mostly, it just really depends on how much air you blow through the instrument.
Pamlico Sound
The bass viole ...
An instrument used to magnify sound
milford sound
the bigger an instrument is, the lower the sound that it makes
it sound like a floote. its a long instrument
the bigger an instrument is, the lower the sound that it makes
it is produced by the string vibrating on the instrument when you strum it.
A frequency meter is the instrument that is used to measure the amplitude of sound. It reads the energy from a sound wave.
depends on what instrument you are talking about
A secondary instrument is a instrument whose sound is in comparison to the main instrument. It also can be a back up instrument.