Just want to see if there is any capacitive speaker in the real world?
most of electronics stuff can be as both inputs and outputs (like dynamic speakers and Mikes), So what about capacitive speakers?
They don't really have a cone, capacitive transducers may have a thin metallic diaphragm or plate or foil of some kind, separated from another with a dialectric material. They work off of electrostatic changes in potential due to oscillations in the gap of the plates, to boil it down to the nuts and bolts at least. Think of them as audio frequency variable capacitors.
Actually, I kind of said it backwards. when used as a microphone element they work that way. The opposite occurs when driving them as a speaker. oscillating charge potentials cause the diaphragm or foil to vibrate mechanically.
Aren't those earpieces that come with crystal radio kits electret speakers, or is it just a highly wrapped coil?
Also wouldn't the bass reproduction be absolutely horrible on those speakers? If it's transformer coupled you'd lose all the low frequencies.
Aren't those earpieces that come with crystal radio kits electret speakers, or is it just a highly wrapped coil?
Also wouldn't the bass reproduction be absolutely horrible on those speakers? If it's transformer coupled you'd lose all the low frequencies.
Honestly I'm not sure about the crystal radio earpieces. But I have heard audio through electret earphones and the reproduction is remarkable. I just think they are inconvenient and pricey so not something you will see at walmart.
I've listened to several amateur radio conversations about various homebrew experiments saying the fidelity is good, particularly in audiophile circles.