Question

Which instrument is used measure the difference in hearing?

Answer 1

The first thing that comes to mind when I think of a sound measuring instrument is a decibel meter. It is a small, portable device that tells the volume of a sound in decibels (or hertz depending on the device). This is the type of device that is used to test speaker levels at concerts or volume levels from industrial equipment. Ear plugs are also rated in decibels and a decibel meter can tell what type of ear plug is needed.

Answer 2

Explanation:

A decibel meter is a measuring instrument used to assess noise or sound levels by measuring sound pressure. Often referred to as a sound pressure level (SPL) meter, decibel (dB) meter, noise meter or noise dosimeter, a sound level meter uses a microphone to capture sound.