Characteristic & Classification of Sound


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Characteristic & Classification of Sound

  1. 1. GOVERNMENT ENGINEERING COLLEGE - BHARUCH PHYSICS 2110011 Classification and Characteristics of sound Nakrani Pratik R. 130140111046
  2. 2. INDEX What Is Sound Classification Of Sound Classification of Audible Sound Properties Of Musical Sound Properties Of Noise Characteristics Of Musical Sound Pitch Loudness Timbre
  3. 3. WHAT IS SOUND?? • Sound is a Vibration In an Elastic Medium With definite Frequency & Intensity… • Longitudinal wave . • requires a medium . • cannot travel in a vacuum.
  4. 4. CLASSIFICATION OF SOUND f < 20 Hz 20 Hz < f < 20 kHz f > 20 kHz
  5. 5. CLASSIFICATION OF AUDIBLE SOUND Musical • The Sound Which Produces Pleasing Effect On The ear is Called Musical Sound. • Sounds Of Sitar, Violin,Flute Noise • The sound That Produces a jarring effect on the ear and unpleasant to hear is called noise. • Sound Of Road Traffic, Crackers,Aeroplane
  6. 6. PROPERTIES OF MUSICAL SOUND • Regular in Shape. • Have definite Periodicity. • They do not undergo a sudden change in amplitude.
  7. 7. • Irregular in Shape. • Do not have Definite Periodicity. • They Undergo a Sudden Change In Amplitude. Properties Of Noise
  8. 8. CHARACTERISTICS OF MUSICAL SOUND Pitch Related To Frequency Of Sound Loudness Related To Intensity Of Sound Timbre Related To Quality Of Sound
  9. 9. PITCH • We can describe pitch by frequency. • Rapid vibrations of the sound source (high frequency) produce sound of a high pitch. • Slow vibrations (low frequency) produce a low pitch. • Different musical notes are obtained by changing the frequency of the vibrating sound source.
  10. 10. PITCH • This is usually done by altering the size, the tightness, or the mass of the vibrating object. • High-pitched sounds used in music are most often less than 4000 Hz, but the average human ear can hear sounds with frequencies up to 18,000 Hz.
  11. 11. LOUDNESS • Loudness is Characteristics which is Common to all sound • As we seen Loudness Is Classified in two types.
  12. 12. LOUDNESS • Loudness & Intensity are Releted to each other by relation Weber-Fechner law L log I L = K log I Where K Is Constant From The Above Equation… Therefore, Loudness is physiological Quantity.
  13. 13. TIMBRE • Quality Of Sound Which Enables us to distinguish between two sounds having the same loudness & Pitch. • Depends on the Presence of overtones.
  14. 14. TIMBRE • It helps Us To Distinguish musical notes emitted by different musical instruments & Voices Of different Person Even Though the Sound have Same Pitch & Loudness