Not only does the diaphragm hold the suspended coil in place, but it moves along with the coil when an audio signal is applied. The diaphragm pushes and pulls air and produces sound waves as it does so. Since it moves along with the coil and the coil moves relative to the audio signal, the sound waves represent the audio signal!
In this design, which makes up most headphone drivers today, the magnets are essential if the driver is to produce sound. The Sennheiser HD Pro link to check the price on Amazon is an excellent example of a pair of moving-coil dynamic headphones:. Note that two other important types of dynamic headphone drivers work with magnets and transducer energy via electromagnetic induction.
As an aside, loudspeakers and studio monitors also utilize the same moving-coil dynamic design, only on a bigger scale. Dynamic microphones also share this moving-coil design, though the wiring and conversion are in reverse.
Neodymium magnets are the strongest kind of permanent magnet available. They were invented in the s and have since become standard in high-quality audio transducers speakers, microphones and, of course, headphones. Neodymium magnets are made from an alloy called NIB, which combines neodymium, iron and boron. They produce powerful magnetic fields and weigh considerably less than other magnets. To further improve upon their performance, Neodymium magnets are coated with nickel or resilient plastic to improve durability and resistance to corrosion or rust.
Of course, not all headphones have top-of-the-line Neodymium magnets. Other headphone magnet materials that also perform well include:. All three of these types require magnets. However, not all headphone transducers need magnets to function. Electrostatic headphones function on electrostatic principles rather than electromagnetic induction and do not include magnets in their design. Rather than utilizing magnets, the electrostatic headphone driver has a positively biased fixed charged diaphragm that is sandwiched between two perforated metal stators, separated by spars.
Note the biasing voltage required of the diaphragm makes electrostatic headphones active, meaning they require power to function properly. The audio signal is applied to the two metal stators also known as plates. When the audio signal is positive, it applies a positive charge on the front plate and an equal but negative charge on the rear plate.
This causes the positively charged diaphragm to move to the back. Conversely, when the audio signal is negative, the front plate becomes negatively charged and pulls the diaphragm while the rear plate becomes positive and pushes the diaphragm. That simple explanation of how electrostatic headphone drivers work shows that they do not require magnets. What are electrostatic headphones? Electrostatic headphones are active headphones that convert audio signals into sound waves via a positively biased diaphragm between two perforated stator plates.
Neodymium magnets produce a higher sensitivity and substantial sound output using less power to do so. They can help produce music at quite a high SPL level sound pressure level with the use of high magnetic flux. Thus, they allow you to create a better earbud, with excellent sound quality, without a substantial price increase. Interested in neodymium magnets? Contact Jobmaster Magnets.
Browse the largest stock of rare earth, ceramic, alnico, flexible strip, flexible sheet or electromagnets that can be shipped worldwide.
We also custom design and manufacture specialty magnets. The advantages of neodymium magnets in headphones speak for themselves. Get in touch today to order yours. Some myths, such as whether a magnet can damage a laptop get passed around as truth and no one really knows why. Maybe we heard it as a child in school or as we got older within our business circle Previously, old magnets could not be recycled to reuse the rare earth metals inside them, but new methods hav Jobmaster Magnets Canada Inc.
Welcome visitor, you can login or create an account. The vibrations of the electromagnet are attached to the diaphragm in the headphone, which is a thin membrane.
As the electromagnet vibrates, the diaphragm will also vibrate and the air around it will, in turn, creating sound. Headphones work because different frequencies vibrate at different rates, the electromagnet will vibrate faster to produce these higher tones and slower produces slower tones. This driver unit is very similar to the dynamic driver unit, but there are few differences on the magnets used.
The planar magnetic driver uses extremely thin magnetic conductors which are like tiny wires and are spread out across the diaphragm. There are not moving electromagnetic coils as the dynamic driver units use. Some people refer to these headphones as Orthodynamic drivers and they are designed to produce quality sound.
With the use of an array of magnets behind the diaphragm, instead of one single permanent magnet, the driver can better react to the electrical current passing through. Just like the previously mentioned driver unit, as the current passes through the polarity changes and the diaphragm interacts causing vibrations and producing sound.
Though this is one of the least likely used driver units, the electrostatic driver units are in some of the most well-made headphones built today. There is one key difference between these electrostatic driver units and the other two previously mentioned. This style of driver unit does not use magnets to move the diaphragm but instead allows the diaphragm to move itself.
The diaphragm is designed using a thin sheet of electrically charge material that sits between two conductive plates. Of these plates, one is positively charged, and one is negatively charged.
As the electrical charges pass through the two plates, the electrically charged diaphragm film will move back and forth, vibrating the air and causing sounds. Comparatively, electrostatic driver unit headphones are usually more expensive than dynamic or planar magnetic headphones.
However, many feel that these are the best headphones on the market today and the sounds produced from this diaphragm are clearer. Of course, the only way to truly find out which headphone style you love the most is to try them yourself. Different headphones will have different magnets housed inside, depending on their price point and the type of headphones you purchase. As previously mentioned, many feel that electrostatic driver unit style headphones are the best on the market today and produce better quality sound.
Equally as important are the magnets found inside of the driver units, as they can impact the quality of the sound and how it is produced. When choosing which headphones you want to purchase, you will want to look at the type of magnet used in the device.
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