How is sound produced in a human larynx or a loudspeaker?
Answers
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Sound is produced when the air which passes through the vocal cords causes them to vibrate and create sound waves in the pharynx, nose and mouth. The pitch of sound is determined by the amount of tension on the vocal folds. ... Like a drum skin vibrating back and forth, the moving cone pumps sounds out into the air.
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Answer:
In the humans, sound is produced in the larynx. While swallowing food, we can feel with our finger a hard bump that seems to move. This is nothing but larynx. It is at the upper end of the windpipe. Two vocal cords are stretched across the voice box or larynx in such a way that it leaves a narrow slit between them for the passage of air. When the lungs force air through the slit, the vocal cords vibrate, producing sound. Muscles attached to the vocal cords can make the cords tight or loose. When the vocal cords are tight and thin, the type or quality of voice is different.
Sound can be produced using a loudspeaker. It consists of a permanent magnet. A coil is wound around it and if a current flows through this coil, it also generates a magnetic field. We know that if two magnets are brought near each other, they move depending on their positions. In the same way, here, depending on the magnetic field created due to the coil, the coil moves back and forth. The frequency and amplitude of the movement of the coil depend on the variables in the current flowing through the coil. As the coil moves, the conical screen of the loudspeaker, which is attached to the coil, also moves back and forth. Due to back and forth motion of the loudspeaker screen, sound waves are produced in an air. We can feel these vibrations of the loudspeaker screen, just by gently touching the screen of a loudspeaker, which is producing sound.