How to make a laser microphone

sound is a vibration when i talk my vocal cords vibrate they make the whole air vibrate and that makes all the objects in the room vibrate including your ears and that's why you hear sound ah a microphone measures all those vibrations and converts them into an electrical signal that electrical signal can be stored reproduced amplified or visualized for visualizing it we can use an oscilloscope the oscilloscope shows you how the microphone is vibrating an oscilloscope can also allow you to measure other signals for example we can measure light with the photo sensor and feed that signal into the computer through the audio cable point a laser to the photo sensor you can actually see that signal in the oscilloscope and you can also sonify that signal by sending that signal to the computer speakers so we're measuring light if we can transform the sound vibrations into movement of the light then we can use the photo sensor to measure those sound vibrations but how do we transform the sun vibrations into movement of the light with a paper cap and a mirror when the air vibrates the bottom of the cap vibrates and the mirror moves then if you point a laser to the mirror the reflection of the laser will move now let's put everything together let's put the photo sensor on the laser path speak and you can hear the sound coming out of your computer [Applause] now we made a laser microphone if you want to know more about the science of waves and music go to listening to waves.com so this is your photo sensor and you have a cable with two sides you will connect one side of the cable to one side of the photo sensors on the other side of the cable to the other side of the photo sensor like this the other side of the cable will connect an audio jack this audio jack has four rings that means that one of those rings corresponds to the microphone input what we will do is connect one of the sides of the cable to this long pin here which is the ground on the other side of the cable to the pin that corresponds to the microphone you

Channel: Victor Minces

Views: 46,959

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Id: SHPtZSKvBME

Length: 3min 57sec (237 seconds)

Published: Wed Nov 11 2020