Flat-panel loudspeakers involve both a panel and an inertia exciter. Their structural vibration and acoustic radiation are quite unique. These devices have flexural resonance and the panel tends to vibrate randomly. Simulation tools are essential for flat-panel loudspeakers because they help with the integration process. The finite element analysis, the fast Fourier, and the electro-mechanical…
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People often confuse air-motion speakers with ribbon loudspeakers, but they are rather different. To begin with, a ribbon one emits a sound when the whole diaphragm moves forward and backwards in a consistent way. Within this process, the plates never change their angles. In contrast, the air-motion transformer shifts its diaphragm in a very different…
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Transparent ionic conduction speakers involve the latest technology. It’s been only a few years since they became available to the public. A couple of Harvard University researchers developed an application of ionic conductivity by designing a clear artificial muscle that produces sounds spanning the complete audible spectrum. Transparent Ionic Conduction Speakers: the Process The composition…
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Plasma arc speakers, also known as ionophores, are a type of loudspeaker that modifies air pressure with a high-energy electrical plasma. When connected to the output of an audio amp, the plasma speakers change the size of the electric arc, the plasma glow discharge, or the corona discharge. Eventually, they operate as a massless radiating…
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Thermoacoustic speakers are devices that produce sound waves from temperature fluctuations. They are good at heating up and cooling down conducting materials. Since they do not rely on vibrations to produce sounds, they only need a simple structure in order to generate sound. These speakers create good quality sound in all directions, so you can…
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Recently, Chinese researchers developed loudspeakers as thin as paper: these are the nanotube speakers. Users can attach it to windows, walls, or clothes. Additionally, people can even insert this loudspeaker into a human ear! The devices consist of transparent carbon nanotube films. People consider them the smallest loudspeakers in the world. Because of their size…
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Donald Leslie created and manufactured the rotary speaker, which people also know as the Leslie speaker. This device refined the sound of the Hammond Organ and revolutionized electronic music. Leslie also invented a special speaker which intended to improve the sound of the Hammond Organ. This speaker rotated itself inside its own cabinet. The Theater…
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