# The physics of mechanical waves

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Sound is one of the most common and substantial forms of energy that envelops our everyday life. Sound is a product of mechanical waves that initiates the natural frequency of an object. This natural frequency sends out vibrating waves that we hear as sound. In order to better understand mechanical waves and electrical impulses you must first be able to understand the properties of waves, speakers and electrical signals.
A key component that is crucial in understanding sound is waves. There are two types of mechanical waves, longitudinal and transverse. In both waves the particles must move with the medium. A medium is the type of object or material that carries the energy through a field. In longitudinal waves the particles move in a parallel direction. An example of a longitudinal wave would be a slinky or an ultra sound machine. However a transverse wave is a wave that moves horizontally. An example of this wave would be any type of electromagnetic wave. Such as radio or light waves.
There are three major properties you must know when understanding waves. The first major property is wavelength. Wavelength is the distance between two points on a wave. The next major property is amplitude. Amplitude is measured by the height of the wave. The higher the wave, the stronger the signal of the wave is. The final property you must know is frequency. Frequency is the amount of times a wavelength transpires in a second. Frequency is measured in kilohertz but it is commonly interpreted as pitch. A high pitch requires a high frequency as does a low pitch require a low frequency.
However what you really need to know about how sound waves work is pressure. Without pressure sound would not exist. Pressure is essentially made up of two t...

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...o generate an alternating magnetic field. This alternating field is the driving force that causes the cone to repel. The coil receives many different ranges of impulses which can cause the cone to move very violently or not at all.
The next major component to a speaker is the suspension. The suspension is what forces the cone to come back after it is pushed out by the pressure. The suspension also plays a major role by keeping the coil from becoming mangled. If the coil were to become mangled then the cone would not be able to function.
The final component of a speaker is the cone. The cone essentially regulates how much air can be pushed out of the speaker. The more air, the greater the mass and output the speaker will have.
Speakers are equip with a fixing that is able to take the power of the signal and make it stronger. This part is known as the amplifier.