Changzhou Su Yang Electronics Co., Ltd.
Address: Changzhou City, the western suburbs of Benniu Town Road No. 30 Taurus
Phone: 133824846598
Fax: 0519-83211109
Official website: www.suyangdz.cn
The speaker is also called "horn"". Is a very commonly used electroacoustic transducing devices in electrical and electronic equipment, sound in can see it. The speaker is one of the most weak parts in the audio equipment, and it is one of the most important parts for the sound effect. Although it is such a simple device, its development is not an overnight, but after a long research and many people's efforts, gradually moving towards maturity and progress. The invention of the speaker is to let "recordings", but despite the efforts of many scientists, this goal has not yet been fully achieved, but is different vocal style, using different manufacturing methods and materials, thus the horn of letting a hundred flowers blossom become sound in the world the most brilliant of a garden. Speakers are divided into built in speakers and external speakers. External speakers that are generally refers to the speakers, built-in speakers is the MP4 player with a built-in speaker. Kinds of speakers and according to the energy exchanging principle can be divided into electric (i.e. moving coil type) and electrostatic (capacitive) and electromagnetic (Reed) and piezoelectric (i.e. crystal type) of several.
Electric speaker
W. Siemens Ernst (founder of Siemens and Halske) is the prototype of the application for the prototype of the speaker in January 20, 1874. The speaker is a sound coil in a magnetic field in which the supporting system is in a magnetic field so that the vibration system can be kept in an axial direction. At that time was mainly used for the relay rather than the speaker. On December 14, 1877, Siemens for horn patent, on top of a moving coil attached to a parchment as sound radiator and parchment paper can be made of exponential type cone shape, the first gramophone age horn type.
In 1898, sir Oliver Lodge further in accordance with the principle of telephone mouthpiece invented cone horn, and we are familiar with the modern horn is very similar, the invention determines the now 99% of modern moving coil loudspeaker structure Lodge Sir said "roaring call". But this invention is not used, because until 1906 De Forest Lee before the invention of the transistor, and made available to expand the machine is a good few years later, so the cone to the 1930's horn to gradually spread.
25 years later, in 1920s, radio broadcast. C. W. rice and E. W. Kellogg: the landmark of the new non horn type unit ", direct radiator loudspeaker are introduced in detail, using this theory to design the Radiola 104 sound box swept the United States.
In the past few decades, the basic principle of electric speakers has not changed, but improved the design details and parts. In terms of frequency range dynamic range compared with the old product has made great progress. Electric speakers with a simple structure, excellent quality, low cost, dynamic has become the mainstream of the current market.