the.com/loudspeaker
a magnet, a coil, and the audacity to shove air around until your ears agree
how it workselectromagnet wiggles a cone to vibrate air
reverse mica speaker run backward becomes a microphone
loudest everNASA's horn can hit 154 decibels, melting matter
horn ancestryearly gramophones used pure shape, no electricity
named bluntlythe word literally just means speaks loud