What is the sound principle of the speaker

Actually, the key of your lecturer may be the concept of electromagnetic induction.

As soon as the AC sound current passes by through the coil from the lecturer (otherwise known as the sound coil in the speaker), a corresponding magnetic industry is made inside the tone of voice coil. high powered speakers  ，This magnet discipline communicates together with the magnet industry created from the long term magnet on the loudspeaker. The speech coil vibrates with all the mp3 present within the magnetic discipline of your speaker's personal permanent magnet.

The diaphragm as well as the sound coil in the lecturer are connected jointly, therefore the diaphragm also vibrates, and the vibrations generates a similar noise as being the initial sound signal waveform. The music is amplified with the principle of resonance, and lastly it really is whatever we humans can hear. 20---20000 Hz identifiable audio.