Working principle of dynamic speakers
Among various types of speakers, the most widely used is the electrodynamic speaker, also known as the moving coil speaker, which is an electro-acoustic transducer device that applies electrodynamic principles. According to Faraday's law, when a current-carrying conductor passes through a magnetic field, it will receive an electromotive force whose direction conforms to Fleming's left-hand rule. The force, current, and magnetic field are perpendicular to each other. Proportional. When the voice coil inputs an alternating audio current, the voice coil receives an alternating driving force to produce an alternating motion, which drives the paper cone to vibrate and repeatedly push the air to produce sound. At present, the most widely used paper cone speakers and horn speakers are all electrodynamic speakers. Speaker size labeling method The nominal size of a round speaker is usually expressed by the largest diameter of the speaker frame, as we usually call an 8-inch speaker, the outer diameter of the frame is 200MM;
The nominal ruler of an elliptical speaker is represented by the long and short axis of the ellipse. As we usually say, the frame size of a 4×6 inch speaker is 100MM×160MM; it is customarily expressed in inches, and the relationship between the two is about 1 inch. Equal to 25.4MM.
