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  2. Headphones - Wikipedia

    en.wikipedia.org/wiki/Headphones

    However, the electret driver has a permanent charge built into it, whereas electrostatics have the charge applied to the driver by an external generator. Electret and electrostatic headphones are relatively uncommon. Original electrets were also typically cheaper and lower in technical capability and fidelity than electrostatics.

  3. MagSafe - Wikipedia

    en.wikipedia.org/wiki/MagSafe

    MagSafe is a series of proprietary magnetically attached power connectors developed by Apple Inc. for Mac laptops. MagSafe was introduced on 10 January 2006, in conjunction with the MacBook Pro, the first Intel-based Mac laptop, at the Macworld Expo.

  4. Silicon on insulator - Wikipedia

    en.wikipedia.org/wiki/Silicon_on_insulator

    There are two types of SOI devices: PDSOI (partially depleted SOI) and FDSOI (fully depleted SOI) MOSFETs. For an n-type PDSOI MOSFET the sandwiched n-type film between the gate oxide (GOX) and buried oxide (BOX) is large, so the depletion region can't cover the whole n region. So to some extent PDSOI behaves like bulk MOSFET. Obviously there ...

  5. Polydimethylsiloxane - Wikipedia

    en.wikipedia.org/wiki/Polydimethylsiloxane

    Polydimethylsiloxane (PDMS), also known as dimethylpolysiloxane or dimethicone, is a silicone polymer with a wide variety of uses, from cosmetics to industrial lubrication and passive daytime radiative cooling.