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  AirPods Max. [credit: Apple ]

This morning, Apple made a surprise announcement : it has started taking orders today for its long-rumored over-ear headphones bearing the AirPods brand. Called AirPods Max , they take design cues from existing Apple products and use several internal sensors and microphones to deliver "computational audio" features.

Priced at $549, AirPods Max are fully wireless headphones, and they use Bluetooth aided by Apple's custom tech to connect to audio sources like an iPhone or a computer. They come with a "Smart Case" that protects the headphones for storage, and puts the headphones in a low-power sleep mode. Additionally, the case has a Lightning port, allowing users to charge the headphones with an included Lightning to USB-C cable.

The above-mentioned sensors include an optical sensor, a position sensor, a case-detect sensor, and an accelerometer in each ear cup, and a gyroscope in just the left ear cup. There are also nine microphones. One is devoted exclusively to voice pickup, while the other eight are used for active noise cancellation; two of the mics perform double duty.