Term: Dhwani MCQs Quiz | Class 9
This quiz is designed for Class IX students of Hindustani Music Melodic Instruments (Code 035). It covers Unit 1, specifically the topic of Dhwani (Sound), focusing on its definition, the concept of sound production, and the distinction between musical sound (Nada) and noise. Submit your answers to check your score and download the detailed PDF answer sheet.
Understanding Dhwani (Sound) in Indian Music
Dhwani is the fundamental element of music. In simple terms, anything that is heard by the ears is called Dhwani or Sound. From a physics perspective, sound is produced by vibrations. However, in the context of Hindustani Music (Sangeet), not all sounds are considered useful.
Key Concepts
- Definition of Dhwani: The sensation of hearing produced by vibrations in a material medium (like air) is called sound or Dhwani.
- Production of Sound: Sound is produced when an object vibrates. These vibrations travel through a medium as waves to reach our ears.
- Musical Sound vs. Noise:
- Musical Sound (Nada): Produced by regular, periodic, and continuous vibrations. It is pleasing to the ear and has a definite pitch.
- Noise (Kolahal): Produced by irregular, discontinuous, and jarring vibrations. It is unpleasant and lacks a definite pitch.
Characteristics of Musical Sound
| Characteristic | Description | Dependent On |
|---|---|---|
| Pitch (Tarata) | The highness or lowness of a sound. | Frequency of vibration |
| Intensity (Tivrata) | The loudness or softness of a sound. | Amplitude of vibration |
| Timbre (Jati/Gun) | The quality that distinguishes two sounds of the same pitch and loudness. | Nature of source / Overtones |
Importance in Music
In Indian classical music, the refined form of Dhwani which is useful for music is called Nada. Nada is the basis of Shruti (microtones), which in turn gives rise to Swaras (musical notes). Therefore, understanding the nature of Dhwani is the first step in learning music.
Extra Practice Questions
- What is the unit of frequency of sound? (Answer: Hertz)
- Can sound travel through a vacuum? (Answer: No)
- What is the term for ‘Struck Sound’ in Indian Music? (Answer: Ahat Nada)
- What is the term for ‘Unstruck Sound’ or eternal sound? (Answer: Anahat Nada)
- Which characteristic helps us identify different instruments playing the same note? (Answer: Timbre or Jati)
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