sound vibrate the eardrum a lightly streched membrane that is the entrance to the middle ear
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Sound travels from a source as a series of compressions and rarefactions in the air (sound waves). These waves enter the ear canal and cause the eardrum to vibrate. The vibrations are then transmitted through the middle ear bones to the cochlea in the inner ear, where they are converted into electrical signals that are sent to the brain via the auditory nerve.
Light is able to travel through outer space because it does not require a medium to propagate, unlike sound which relies on particles to transmit vibrations. In the vacuum of space, there are no particles for sound waves to transfer energy through, so sound cannot travel.
Sound waves enter the ear canal and cause the eardrum to vibrate. These vibrations are transmitted through the middle ear bones to the inner ear, where they are converted into electrical signals by hair cells. These signals travel along the auditory nerve to the brain, which then processes them as sound.
Sound waves require a medium to travel through to propagate from point A to point B. In space there is no such medium, so sound does not travel in space.
Sound requires a medium, such as air, water, or solid surfaces, to travel through. In outer space, there is no medium for sound waves to travel through, so sound cannot propagate in the vacuum of space.
Sound needs to travel in medium like air, but there is no air in outer space, so sound is unable to travel. So basically sound needs air to travel, if there is no air sound cannot travel, when sound is unable to travel you cannot communicate (talk, speak, etc)