The document discusses the key characteristics of sound: intensity and loudness, pitch, and quality. It defines each characteristic, such as intensity depending on amplitude and loudness being a physiological sensation. Pitch refers to how high or low a sound is and depends on frequency. Quality or timbre allows distinguishing between sounds of the same pitch and loudness, determined mainly by harmonic content and dynamic characteristics.

2. ARE YOU READY FOR
TONIGHT’S CONCERT?

5. CHARACTERISTICS OF SOUND
•Intensity and Loudness
•Pitch
•Quality

6. INTENSITY AND LOUDNESS
Loudness is a physiological sensation. It depends
mainly on sound pressure but also on the spectrum of
the harmonics and the physical duration. The intensity of
sound, at a given distance, depends upon the amplitude
of the waves. Thus, a tuning fork gives out more energy
in the form of sound when struck hard than when struck
gently. You should remember that when a tuning fork is
struck, the sound is omnidirectional (heard in all
directions), because the sound waves spread out in all
directions.
www. personal.cityu.edu.hk/~bsapplec/characte.htm+characteristics+of+sound&cd=1&
www.electriciantraining.tpub.com/14182/css/14182_32.htm

7. PITCH
Pitch refers to how low or high a sound is.
The pitch of a sound depends on its frequency. A
high pitch sound has a high frequency and a low
pitch sound has a low frequency.
The human ears can detect sounds between
frequencies of 20 and 20 000 Hz. Sounds above
this range are ultrasonic. Dogs can hear
frequencies up to 25 000 Hz.

8. DOPPLER EFFECT
Have you noticed how the pitch of the police
vehicle siren gradually drops as it moves away
from you? As the siren approaches, the distance
of the sound waves decreases or becomes
shorter. When the ambulance moves away, less
waves reach you each second, and the pitch
becomes lower. Any change in frequency when
you or wave source moves is known as Doppler
Effect, a phenomenon named after its
discoverer, Christian Doppler.

9. DOPPLER EFFECT

10. QUALITY OF SOUND
Sound "quality" or "timbre" describes those
characteristics of sound which allow the ear to
distinguish sounds which have the same pitch
and loudness. Timbre is then a general term for
the distinguishable characteristics of a tone.
Timbre is mainly determined by the harmonic
content of a sound and the dynamic
characteristics of the sound such as vibrato and
the attack-decay envelope of the sound.
http://hyperphysics.phy-astr.gsu.edu/hbase/sound/timbre.html

11. IN GENERAL……
There are three
characteristics of sound waves
the intensity and loudness,
pitch and the quality of sound.