Find out what is the structure and working principle of the gramophone?

A phonograph is an electric device used to broadcast record recordings; It was invented by the American inventor Thomas Edison in 1877. Gramophone records can be easily reproduced in large quantities and play back longer than most barrel recording media, which is why the phonograph is known as one of Edison's greatest inventions. So what is the principle of the phonograph.

1. On a black turntable, the sound vibration is realized by an undulating track or groove, which fluctuates on the plane of the turntable, reproducing the pressure changes of the sound waves as accurately as possible. As the stylus moves along the groove, the tip vibrates slightly as the groove fluctuates. This vibration is amplified by a membrane transmitted by a mechanical device and emitted into the air.

2. When the turntable rotates at the same speed as when recording, the sound is accurately recovered, if not, the vibration frequency it produces is different from the recording frequency. The various rustling sounds come from the dust, causing additional movement of the stylus.

3. Old record players include hand-cranked record players, 4-speed record players, etc. After the hand-cranked record player is fully wound, it can **1 record in a row with 2 sides. The 4-speed record player** coarse grain record effect is better than the dense grain record, and the steel needle record is still unsatisfactory, and it can also be convenient for transcribing tapes.

The cartridge of the drill needle machine is a diamond, which does not need to be replaced, but the "rustle" sound is louder; The needle piece has a small noise and a loud timbre, but the stylus needs to be replaced. An old record player at a low price can be left for fun, but it won't be in good condition. A record player with good performance and good quality is collectible.

4. Records are divided into steel needle records, dense grain records, coarse grain records, and drill needle records. **Pavette and needle tabs use their own cartridges to protect pale discs. The record should be clean, and the dust in the sound groove will affect the **.

The above is an introduction to the principle of the phonograph.

Gramophones can be simply divided into: turntable, loudspeaker, tonearm, cartridge.

1. Turntable, the phonograph turntable is used to place the record chain, and drive the record to rotate, so that the gramophone shouts to the nuclear machine stylus to read the analog Zheng digging signal on the vinyl record, so as to make a sound.

3. Tonearm, the front end of the tonearm is the cartridge, and the back is a gyratory device, and now there is generally a gramophone automatic arm retracting function, that is, after the vinyl record on the phonograph turntable, the tonearm is automatically retracted, the tonearm is retracted, and the turntable is automatically stopped.

4. Cartridge, the main component on the cartridge is the stylus, which is also one of the main components of the phonograph, the analog signal of the stylus is converted to vibration, and the vibration signal is transmitted to a special membrane, which reproduces the sound wave pressure and becomes sound, and then amplified by the loudspeaker.

Gramophone mechanism is made of: turntable, loudspeaker, tonearm, cartridge.

In the structure of the phonograph, whether it is a huge chassis or a small wooden box, it is more decorative than practical; Because whether it is a large case or a small case, it is empty inside, and only a small mechanical movement occupies a small place. The movement consists of a set of clockwork gears that rotate the turntable at a constant speed.