0

Cape4all is a Multi-Microphone Audio Extension Cape for BeagleBone Black

Cool project board available for the BeagleBone Black – with complete board and schematic files available on GitHub. Opensource.com reports capes like this are being used in conjunction with beamforming to operate as spatial hearing aids – brilliant!

Cape4all

Open Hardware Multichannel Sound Interface for Hearing Aid Research on Beaglebone Black

Hardware Design Files

The published Beaglebone AD/DA Cape schematic and board layout files were developed by the Institute of Microelectronic Systems at Leibniz Universität Hannover together with the videantis GmbH within DFG Cluster of Excellence EXC 1077/1 “Hearing4all” They are published unter the CC BY-NC-SA 4.0 license.

Kernel Driver Files

These were developed by 64Studio for HörTech gGmbH. They are published under the GPLv2 license.

See the respective directories for the full license text.

The Cape4all, presented recently at the Linux Audio Conference in Berlin, Germany, runs at a sample rate from 24kHz to 96Khz with as few as 12 samples per period, leading to internal latencies in the sub-millisecond range. With hearing enhancement algorithms running, the complete round-trip latency from a microphone to an earpiece has been measured at 3.6 milliseconds (at 48KHz sample rate with 16 samples per period). Using the speed of sound for comparison, this latency is similar to listening to someone just over four feet away without a hearing aid.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 14,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython 2019!

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — A list of companies owned by Amazon. It’s big.

Wearables — Raid the kitchen

Electronics — Capacitor ESR

Biohacking — Vitamin-C + Gelatin for Accelerated Recovery

Python for Microcontrollers — Python snakes its way to the STM32, Serpente, and more!

Adafruit IoT Monthly — Adafruit IO Updates, RGB Stream Deck Message Panel, and more

Microsoft MakeCode — Welcome to the MakeCode Newsletter!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



1 Comment

  1. Can it do ANC ? I would like to make some trials in my car using such type of board and the line-in.
    Maybe this may never work at all anyway…

Sorry, the comment form is closed at this time.