The necessity for underwater research is quite high, especially for countries with vast oceans.
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Sound is a collection of random signals that have certain physical characteristics that depend on the sound source. One of the physical characteristics of sound can be seen from the spectrum formed. There is a lot of noise that can be distinguished based on the spectrum character, such as White Noise, Pink Noise, ….
Scientists at Lancaster University and the University of Oxford have created a nano-electronic circuit which vibrates without any external force.
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