Definition of Sound Waves
All that can be heard with the ears is sound. (Sound Waves are what type of wave ) Sound emanates from sound sources. Sound is by its nature a longitudinal mechanical wave in which the pressure varies from time to time over time.
Sound travels through a substance at a certain speed, the speed of sound. It can be reflected, refracted and absorbed. Since sound is a mechanical wave, sound waves are accompanied by diffraction and interference.
With our ears we hear various noises, speech and music, but also unpleasant noises. Simply put, one can say: all that can be heard with the ears is sound.
Humans hear sound only when its frequency is between 16 Hz and 20,000 Hz and the volume of the sound is above the threshold of hearing and below the threshold of pain. But the frequency of sound can also be less than 16 Hz. Then someone talks about infrasound. A sound with frequencies above 20,000 Hz is called ultrasound.
Sound Waves are what type of wave
Sound waves are longitudinal mechanical waves, whose frequency ranges from 16 Hz to 2000 Hz, and they are felt by our ears. Sound waves are called.
Types of Sound Waves
- Longitudinal Sound Waves
- Pressure Sound Waves
- Mechanical Sound Waves
- Transverse Waves
Effect of Pressure On The Speed Of Sound
Pressure has no effect on the speed of sound. That is, the speed of sound does not change when the pressure is increased or decreased.
Effect Of Heat On Speed Of Sound
On increasing the temperature of the medium, the speed of sound in it increases. The speed of sound increases by 0.61 m/s for every 10°C of increase in temperature in air.
Effect Of Humidity On Speed Of Sound
The density of moist air is less than that of dry air, so the speed of sound is higher in moist air than in dry air.
Speed of Sound
Sound waves do not propagate instantaneously, but at a certain finite speed (similar to the speed of uniform motion).
That is why during a thunderstorm we first see lightning, that is, light (the speed of light is much greater than the speed of sound), and then comes sound.
The speed of sound depends on the environment: the speed of sound in solids and liquids is much higher than in air. These are tabular measured constants. With an increase in the temperature of the medium, the speed of sound increases, with a decrease it decreases.
Pitch, Timing And Volume of Sound
The voices are different. To characterize sound, special values are introduced: loudness, pitch and timbre of sound.
The volume of sound depends on the amplitude of the vibration: the greater the amplitude of the vibration, the louder the sound. Furthermore, our ear’s perception of the loudness of sound depends on the frequency of vibrations in the sound wave. Higher frequency waves are perceived to be louder.
Sounds coming from different sources are a collection of harmonic vibrations of different frequencies. The component of the longest duration (lowest frequency) is called pitch. The rest of the sound is in overtones. The set of these components makes up the color, timing of the sound.
The set of vowels in different people’s voices is at least slightly, but different, and this determines the timbre of a particular voice. The frequency of a sound wave determines the pitch. The higher the vibration frequency of the sound source, the more sound is emitted. Human voices are divided into several categories in height.
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