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A pistonphone is an acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones. The principle relies on a piston mechanically driven to move at a specified cyclic rate, pushing on a fixed volume of air to which the microphone under test is coupled.
The M1 13-inch MacBook Pro was released alongside an updated MacBook Air and Mac Mini as the first generation of Macs with Apple's new line of custom ARM-based Apple silicon processors. [114] This MacBook Pro model retains the same form factor/design and added support for Wi-Fi 6, USB4, and 6K output to run the Pro Display XDR. [115]
The MacBook Pro line launched in 2006 as an Intel-based replacement for the PowerBook line. The first MacBook Pro used an aluminum chassis similar to the PowerBook G4, but replaced the PowerPC G4 chips with Intel Core processors, added a webcam, and introduced the MagSafe power connector. The unibody model debuted in October 2008, so-called ...
As part of the Mac transition to Intel processors, Apple released a 13-inch laptop simply named "MacBook", as a successor to the PowerPC-based iBook series of laptops. . During its existence, it was the most affordable Mac, serving as the entry-level laptop that was less expensive than the rest of the Mac laptop lineup (the MacBook Pro portable workstation, and later the MacBook Air ultra-port
Reviewers lamented the base memory configuration of 8 GB on the standard M3 MacBook Pro. [152] In March 2024, the MacBook Air was also updated to include the M3 chip. [153] In October 2024, several Macs were announced with the M4 series of chips, including the iMac, a redesigned Mac Mini, and the MacBook Pro; all of which included 16 GB of ...
A microphone, colloquially called a mic (/ m aɪ k /), [1] or mike, [a] is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones , hearing aids , public address systems for concert halls and public events, motion picture production, live and recorded audio engineering , sound ...
To maximize gain before feedback, the amount of sound energy that is fed back to the microphones must be reduced as much as is practical.As sound pressure falls off with 1/r with respect to the distance r in free space, or up to a distance known as reverberation distance in closed spaces (and the energy density with 1/r²), it is important to keep the microphones at a large enough distance ...
A first-generation Mac Pro, showing the aluminum case derived from the Power Mac G5. Apple said that an Intel-based replacement for the 2003's PowerPC-based Power Mac G5 machines had been expected for some time before the Mac Pro was formally announced on August 7, 2006, at the annual Apple Worldwide Developers Conference (WWDC). [4]
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