Question

What Is Loudness Of Sound!
In English And Hindi!

#BAL​

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.

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Answer 2

Explanation:

• loudness refers to how large the amplitude of the sound wave is. The decibel (dB) scale for measuring loudness is directly proportional to the square of the amplitude of the vibration. Thus, noise is defined as sounds above 80 dB.

• The loudness of a sound is a phenomenon caused by the amplitude of the sound wave. The sound was said to have been loud if the amplitude of the sound wave was sufficiently large.

• This same loudness of sound is represented throughout decibels, being directly proportional to the squared amplitude of vibration (dB).

Units

decibels:-

We measure sound intensity (also referred to as sound power or sound pressure) in units called decibels. Decibels (dB) are named in honor of Alexander Graham Bell, the inventor of both the telephone and the audiometer.

Energy

• Sound intensity may be measured in units of energy or work—e.g., microjoules (10-6 joule) per second per square centimetre—or in units of power, as microwatts (10-6 watt) per square centimetre.

• Unlike loudness, sound intensity is objective and can be measured by auditory equipment independent of an observer's hearing.

Formula

$\mathrm{I}=2\pi^{2}\nu^{2}\delta^{2}\rho \: c$

${ \mathtt{\mathrm{I} =\: sound \: intensity}}$

${ \mathtt{ \nu =frequency \: of \: sound}}$

${ \mathtt{ \delta=amplitude \: of \: the \: sound \: wave}}$

${ \mathtt{ \rho = density \: of \: medium \: in \: which \: sound \: is \: traveling}}$

${ \mathtt{c=speed \: of \: sound}}$

In Hindi

प्रबलता ध्वनि की तीव्रता के लिए कानों की शारीरिक अनुक्रिया है । यह उसके आयाम पर निर्भर करती है ।

• ऐसी ध्वनि को जिसमें अधिक ऊर्जा होती है उसको प्रबलता कहते हैं ।
• इकाई क्षेत्र से एक सेकेण्ड में गुजरने वाली ध्वनि ऊर्जा को ध्वनि की तीव्रता कहते हैं ।

यह उसके आयाम पर निर्भर करती है। ऐसी ध्वनि को जिसमें अधिक ऊर्जा होती है उसकी प्रबलता कहते हैं।

• (i) आयाम पर,
• (ii) ऊर्जा पर,
• (iii) तीव्रता पर,
• (iv) तरंग के वेग पर, इकाई क्षेत्र से 1 सेकेंड में गुजरने वाली ध्वनि को प्रबलता कहते हैं।

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