With reference to the 'Quality' or 'Timbre' of sound, consider the following statements: 1. It enables us to distinguish one sound from another having the same pitch and loudness. 2. A sound of a single frequency is called a note. 3. A sound produced by a mixture of several frequencies is called a tone. Which of the statements given above is/are correct?

The correct option is (a). Explanation Sound waves are characterized by three fundamental properties: loudness, pitch, and quality (or timbre). These characteristics determine how the ear perceives sound based on amplitude, frequency, and waveform complexity. Statement-wise Analysis: - Statement 1 is Correct: Quality or timbre is the characteristic of sound that enables us to distinguish between two sounds having the same pitch and loudness. This distinction arises because different sources (like a violin and a flute) produce different waveforms due to the presence and relative strength of overtones (harmonics). - Statement 2 is Incorrect: A sound composed of a single frequency is technically defined as a tone. Pure tones are typically produced by devices like tuning forks. - Statement 3 is Incorrect: A sound produced by a mixture of several frequencies is called a note. Musical instruments generally produce notes, which are pleasant to the ear and consist of a fundamental frequency combined with various harmonics. Key Takeaway: A tone refers to a single frequency, while a note is a composite sound of multiple frequencies. Timbre is the unique quality that distinguishes sounds of identical pitch and loudness.

With reference to the 'Quality' or 'Timbre'… - NCERT Class 9 Science MCQ

NCERT Class 9 Science — Chapter 5: Sound

mcqmedium

With reference to the 'Quality' or 'Timbre' of sound, consider the following statements:

It enables us to distinguish one sound from another having the same pitch and loudness.
A sound of a single frequency is called a note.
A sound produced by a mixture of several frequencies is called a tone.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 9 · Page 6

Options

A1 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (a).

Explanation

Sound waves are characterized by three fundamental properties: loudness, pitch, and quality (or timbre). These characteristics determine how the ear perceives sound based on amplitude, frequency, and waveform complexity.

Statement-wise Analysis:

Statement 1 is Correct: Quality or timbre is the characteristic of sound that enables us to distinguish between two sounds having the same pitch and loudness. This distinction arises because different sources (like a violin and a flute) produce different waveforms due to the presence and relative strength of overtones (harmonics).
Statement 2 is Incorrect: A sound composed of a single frequency is technically defined as a tone. Pure tones are typically produced by devices like tuning forks.
Statement 3 is Incorrect: A sound produced by a mixture of several frequencies is called a note. Musical instruments generally produce notes, which are pleasant to the ear and consist of a fundamental frequency combined with various harmonics.

Key Takeaway:

A tone refers to a single frequency, while a note is a composite sound of multiple frequencies. Timbre is the unique quality that distinguishes sounds of identical pitch and loudness.

Your note

More from Chapter 5: Sound

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