Is the working principle of loudspeaker electromagnetic induction?

Yes The principle is that the current generates a magnetic field through the coil of the speaker, which interacts with the magnetic field of the external permanent magnet to push the paper basin of the speaker to move. When alternating current passes through, the paper basin vibrates to produce sound. Electromagnetic induction is the principle of the generator, and so are some coil microphones. The loudspeaker generates a magnetic field through the current passing through the coil, and the interaction between the magnetic field and the magnet makes the diaphragm vibrate, thus generating sound. Loudspeaker, also known as loudspeaker, is a commonly used electro-acoustic conversion device. Les and Kellogg first patented the loudspeaker in 1924, which is also the embryonic form of modern loudspeaker. 1930, Bostwick made a high-frequency loudspeaker. Eight years later, the "excited" speaker was replaced by the "permanent magnet" speaker. [8] In the middle and late 20th century, speakers made many achievements in improving quality, popularity, electroacoustic theory and measurement technology.