"How speakers make sound" to explain the structure of the speaker with GIF animation

A site expressing the state of the engine of an automobile / airplane and the way of moon walk by GIF animation "AnimagraffsHas released a new work. This time, the mechanism that the speaker produces the sound is illustrated.

How speakers make sound - Animagraffs
http://animagraffs.com/loudspeaker/

Since the structure of the speaker is explained step by step on the site, it is possible to understand roughly the work of the speaker simply by reading from the top in order. First of all, the basic parts that make up the speaker. The most important parts among these are "Corn (Cone) "For forming the body," frame (or "basket"Basket) ", Which produces the driving force of the cone" voice coil (Voice coil) "And" Magnet (Magnet) "Has become.


The driving force that moves the cone and sounds the sound is created by the magnetic force generated by the electromagnet. The signal of the sound input from the amplifier is the signal of the conductor wound in the brown cylinderVoice coil"Electromagnetic force is generated, and a black donut shaped" fixed "on the main body sidemagnet"By repelling and attracting, vibrations are created. This movement is on siteReproduction with GIF animationIt is a check as it is being done.


The same as the voice coil instead of the permanent magnetType using electromagnetThe speaker ofField type speakerThere is still a strong fans in the unique sounding condition etc. It was widely used from the first half of 1900 to the middle stage, but it has become less used since the development of permanent magnets with good performance and cost reduction.

Vibration generated by the voice coil is "corn"It is transmitted to the front and back to move a lot of air to generate loud noise. At the base of the cone is "spider"(Spider· Or "damper"), the widest part is "Edge"(in EnglishSurround) Are glued together, it supports the cone, determines the position, and works in the most appropriate position.


In the first place, "sound" is what is created by "vibration of air", and its vibration is expressed in the form of waves. When the cone of the speaker oscillates back and forth, a sound wave is generated in the air, and the sound wave is reflected by the eardrum of the ear (EardrumBy vibrating, people and animals can sense sound.


In addition, "height of sound" is "speed of vibration", the higher the sound, the narrower (faster) the width of the wave. As shown in the figure, when low and high sounds are simultaneously generated, it becomes possible to express as a jaggy wave multiplied by two waves.


Combining waves complicatedly makes it possible to express various kinds of sounds. As shown in the figure, every musical instrument such as bass and piano has a unique waveform pattern (harmonic overtone component), and human beings can distinguish musical instruments by feeling the difference. The work of the speaker is to reproduce various kinds of sound by faithfully reproducing the movement of such complicated waves.


In this way, the movement of the speaker was expressed in GIF animation in the site in an easy-to-understand manner.

This site "How speakers make sound" was created by graphic designerJacob O'NealMr. On the site of O'Neal, from the mechanism of the engine and how the animals run, the way of moon walks are expressed by GIF animation, and people who like mechae like me can enjoy it.

Animagraffs - Animated infographics by Jacob O'Neal
http://animagraffs.com/