Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
What event eventually led to the discovery of the Southern Oscillation?
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A drought in India that resulted in a massive famine.
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Flooding in Asia that led to massive crop failure and a large famine.
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In 1911, a catastrophic failure of the South American fishing industry to meet normal harvest quotas occurred. This led the fishing industry to search for the cause of the decline in fishing stock.
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Invasive fungal spores were blown from Africa, across the Atlantic, to Brazil. This resulted in a massive loss of wheat and soy beans yields, ultimately resulting in a large scale famine across most of South America.
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