Q: The instrument used to show the loudness or amplitude of a sound is called a ? A.endoscope B.microscope C.telescope D.oscilloscope 

Expert Answers

An illustration of the letter 'A' in a speech bubbles

The answer is (D), the oscilloscope.

An oscilloscope is an electronic instrument, which is used for graphical representation of electrical signals that vary over time.

In an oscilloscope, the values of the electric signals are displayed on a screen with coordinates (X, Y), where typically the horizontal axis (x) represents...

Unlock
This Answer Now

Start your 48-hour free trial to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.

Start your 48-Hour Free Trial

The answer is (D), the oscilloscope.

An oscilloscope is an electronic instrument, which is used for graphical representation of electrical signals that vary over time.

In an oscilloscope, the values of the electric signals are displayed on a screen with coordinates (X, Y), where typically the horizontal axis (x) represents time and the vertical axis (y) represents the voltage. The voltage measured at the vertical axis represents the signal amplitude. With the time measured in the x axis you can know the frequency of the signal based on the formula f = 1/T, where T is the signal period.

Approved by eNotes Editorial Team