Explain breifly about characteristics of sound waves
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Answer:
Sound wave can be described by five characteristics: Wavelength, Amplitude, Time-Period, Frequency and Velocity or Speed. The minimum distance in which a sound wave repeats itself is called its wavelength.
Answer:
characteristics of Sound
What makes music different from noise? A bird’s call is more melodic than a car alarm. And, we can usually tell the difference between ambulance and police sirens - but how do we do this? We use the four properties of sound: pitch, dynamics (loudness or softness), timbre (tone color), and duration.
Frequency (Pitch)
Pitch is the quality that enables us to judge sounds as being “higher” and “lower. It provides a method for organizing sounds based on a frequency-based scale. Pitch can be interpreted as the musical term for frequency, though they are not exactly the same. A high-pitched sound causes molecules to rapidly oscillate, while a low-pitched sound causes slower oscillation. Pitch can only be determined when a sound has a frequency that is clear and consistent enough to differentiate it from noise. Because pitch is primarily based on a listener’s perception, it is not an objective physical property of sound.
Amplitude (Dynamics)
The amplitude of a sound wave determines it relative loudness. In music, the loudness of a note is called its dynamic level. In physics, we measure the amplitude of sound waves in decibels (dB), which do not correspond with dynamic levels. Higher amplitudes correspond with louder sounds, while shorter amplitudes correspond with quieter sounds. Despite this, studies have shown that humans perceive sounds at very low and very high frequencies to be softer than sounds in the middle frequencies, even when they have the same amplitude.
Timbre (Tone Color)
Timbre refers to the tone color, or “feel” of the sound. Sounds with various timbres produce different wave shapes, which affect our interpretation of the sound. The sound produced by a piano has a different tone color than the sound from a guitar. In physics, we refer to this as the timbre of a sound. It’s what allows humans to quickly identify sounds (e.g. a cat’s meow, running water, the sound of a friend’s voice).
Duration (Tempo/Rhythm)
In music, duration is the amount of time that a pitch, or tone, lasts. They can be described as long, short, or as taking some amount of time. The duration of a note or tone influences the timbre and rhythm of a sound. A classical piano piece will tend to have notes with a longer duration than the notes played by a keyboardist at a pop concert. In physics, the duration of a sound or tone begins once the sound registers and ends after it cannot be detected.
Explanation:
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