Question

Explanation Loudness , Pitch , Ultrasound , 3 application of sound.
Explain in details!!
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Answer 1

Answer:

In acoustics, loudness is the subjective perception of sound pressure. ... Loudness, a subjective measure, is often confused with physical measures of sound strength such as sound pressure, sound pressure level (in decibels), sound intensity or sound power.

Pitch, in music, position of a single sound in the complete range of sound. ... Sounds are higher or lower in pitch according to the frequency of vibration of the sound waves producing them.

An ultrasound scan is a medical test that uses high-frequency sound waves to capture live images from the inside of your body. It's also known as sonography. The technology is similar to that used by sonar and radar, which help the military detect planes and ships.

Explanation:

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Answer 2

$\huge\underline{\underline{\red{\textbf{Explanation : -}}}}$

››Loudness :-

The loudness of sound is a measure of the the sound energy reaching the ear per second .

The loudness of sound depends on the ${\underline{\red{\textrm{Amplitude}}}}$ of sound waves .

• Greater the amplitude of sound waves, louder the sound will be .

★ Note :

• The loudness of sound is measured in "Decibel" written as dB.

›› Pitch :-

pitch is that characteristic of sound by which can be distinguish between different sounds of the Same loudness.

• The pitch of sound depends on the ${\underline{\red{\textrm{Frequency}}}}$ of vibration.

• The pitch of sound is directly proportional to it's frequency.

›› Ultrasound :-

The sounds having too high frequency which cannot be heard by human beings are called ultrasonic sound or ultrasound .

★ Applications of ultrasound :

ultrasound waves have a very - high frequency due to which they can penetrate into matter to a large extent.

• 1) Ultrasound is used in industries for detecting flaws in metal blocks without damaging them.

›› The flaws like : industrial cracks,..etc in metal blocks are detected by using ultrasound.

• 2) Ultrasound is used to break kidney stones into fine grains (which then flushed out with urine).

• 3) Ultrasound is used in "sonar" apparatus to measure the depth of sea(or ocean).

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