Loudspeakers are systems that convert electrical audio signals into sound. An amplifier must be used to enhance the sound before the signal is transmitted to the
Modern dynamic speakers were first developed in the 1920s. They use magnetic fields to drive coils or magnets attached to the diaphragm. The earliest amplifier was the horn. From 1880 to the 1920s, Thomas Edison, Magna Waugh, and victora produced advanced high-performance speakers. The problem with speakers is that they cannot amplify the pitch. Now there are more and more speakers calledthe loudest speakers because of these foundations.
Nowadays, technology is developing at a high speed. For example, take the hidden camera with built-in loudspeakers as an example. This is a camera used to secretly shoot people, usually without the consent of others.
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Most commercial loudspeakers are passive and use external amplifiers. All household loudspeakers have various designs, aesthetics, and price ranges, and most of them are passive loudspeakers. Modern loudspeakers, ceiling loudspeakers, sound sticks, and subwoofers are all common types of loudspeakers in today's homes. Each type of loudspeaker has its characteristics and is suitable for various purposes.
There are many kinds of loudspeakers, which can be divided into electric type, electrostatic type, electromagnetic type, piezoelectric type, and other types according to their energy conversion principle. The latter two types are mostly used in rural cable broadcasting networks; According to the frequency range, they can be divided into low-frequency speakers, mid-range speakers, and high-frequency speakers, which are often used as combined speakers in speakers.
According to the energy exchange mechanism and structure, the electric loudspeaker has the advantages of good electroacoustic performance, firm structure, and low cost, and is widely used;
According to the sound radiation materials, it can be divided into paper basin type, horn type, and diaphragm type; According to the shape of the paper basin, it is divided into circular, oval, double paper basins, and rubber folding rings; According to the working frequency, it is divided into bass, midrange, and treble, and some are also divided into special recorders, special TVs, ordinary and high fidelity speakers; Divide low impedance and high impedance according to voice coil impedance; According to the effect, it can be divided into direct radiation and ambient sound.
Speakers are divided into internal speakers and external speakers, and external speakers are generally referred to as speakers. A built-in speaker means that the MP4 player has a built-in speaker so that users can not only listen to the sound emitted by the MP4 player through the headphone jack but also the built-in speaker. Mp4 player with built-in speakers can avoid the inconvenience of wearing headphones for a long time without external speakers.