Akustica, based in Pittsburgh, Pennsylvania, puts a MEMS microphone complete with the circuitry needed for digital output into a package less than 5mm square.

ECONOMIST: Noise-cancelling technology

Mr Bouchaud is finding more than one MEMS microphone inside ever more of the products he disassembles, and these extra mikes are often being used to add noise-cancelling features.

ECONOMIST: Noise-cancelling technology

The Digital Silence DS-421D headset is also fitted with a Wolfson WM7130 MEMS microphone in each ear bud to pick up the ambient noise around the user prior to cancellation.

ENGADGET: Wolfson ready Digital Silence noise-cancelling headphones for Spring 2012

Designed for a top-quality high-definition videoconferencing experience, the OpenTablet 10 features a front-facing 720p camera, wide band stereo speakers with a connector for external speakers or headset hookup, a digital MEMS microphone, and HDMI port for 1080p output to an external HD display.

ENGADGET: OpenPeak debuts OpenTablet 10 with transflective display

Edinburgh-based Wolfson, which specialises in audio parts for consumer electronic products, said sales were driven by a strong performances from its audio hubs and micro-electro-mechanical systems (Mems) microphone product lines.

BBC: Wolfson Microelectronics upbeat as chip sales surge