Question
When a sound can be heard it is called? (A) Decibel (B) Ultrasound (C) Audible (D) Rarefaction
Answer
4.2
(222 Votes)
Winifred
Veteran · Tutor for 10 years
Answer
C Audible
Explanation
## Step 1:Identify the definition of each option given in the multiple-choice question.## Step 2:Understand the meaning of the term "when a sound can be heard." This refers to the quality of a sound that makes it detectable by the human ear.## Step 3:Match the term that best fits the definition of a sound that can be heard by humans.### \( \textbf{Decibel (A)} \) is a unit of measurement for the intensity of sound.### \( \textbf{Ultrasound (B)} \) refers to sound waves with frequencies higher than the upper audible limit of human hearing, which is not audible to humans.### \( \textbf{Audible (C)} \) refers to sounds that can be heard by the human ear.### \( \textbf{Rarefaction (D)} \) is a term used in physics to describe a region in a longitudinal wave where the particles are furthest apart.## Step 4:Choose the term that directly corresponds to the concept of a sound being heard by humans.