Oh for sure, there’s a famous quote that goes along the lines of “Technology at a certain point to the average person is indistinguishable from magic”
we have electromagnets inside the speaker that can alternate between the two potentials at the same frequency/speed as is required for the tone in question?
Right on the money! For subwoofers they’re huge cones and huge magnets (I LOVE the pressure of an 18" super scooper), those go at 15-150 times a second back and forth. For your phone speakers or earphones they’ve the tiniest membranes that go at 200-18000 times per second. A quality soundsystem will combine these to get a range from 20-22000Hz which is a little more than our ears ability.
bluesheep@sh.itjust.works 5 days ago
If you want to know something else mind blowing, you can actually use a speaker as a (very shitty) microphone! The same principle of moving the cone by applying a voltage works in reverse: if you move the cone you will create a voltage. And since sound is nothing but moving air, talking into a speaker cone will create a voltage in relation to the sound.
kernelle@lemmy.dbzer0.com 5 days ago
Thats the sidenote on my previous comment!
bluesheep@sh.itjust.works 4 days ago
Oh shit lmao I completely read over that. Guess we both thought it fascinating enough to mention haha
kernelle@lemmy.dbzer0.com 4 days ago
No worries! I did blow out a microphone this way, plugged it in an out- instead of an input and only realised my mistake when I heard faint music through the microphone