Release Notes - 2019B

URL: https://github.com/nihospr01/OpenSpeechPlatform-2020B/tree/2019b_v2.1

Transducers

The BTE-RIC files now contain V2 of the rigid PCB and V4 of the flex PCB. These changes improve the yield and reliability of BTE-RICs assemblies. Release 2019b includes V4 of the CAD files for printing BTE-RIC shells.

Hardware

In this release, we re-designed the carrier board that used Myon-1 model from Keith&Koep to use model Dart-sd410 from Variscite as we were facing supply problems from Keith&Koep.

Release 2019b contains the V8 board design which includes battery charging, buttons for on/off, and mute functionality.

The release also contains V5 of the CAD files for printing cases for the processing and communication device (PCD).

Firmware and OS

The boot.img and rootfs.img files have been updated to include drivers for the IMUs in the BTE-RICs and onboard the pendant.

The onboard audio built into the SnapDragon 410C/Power Management IC has been enabled in the device tree for the 2 onboard audio inputs channels.

Software

The previous release incurred end-to-end analog latency of about 2.5 ms with the RT-MHA disabled and about 5.8 ms with RT-MHA enabled. This release contains a Left+Right beamformer (BF) with 5 ms additional latency and runs realtime. The BF provided about 12 dB speech to interference ratio improvement in file-based simulations.

The software also includes additional bug fixes, improvements, and documentation.

Applications

This release includes improvements to (i) researcher apps, (ii) self-fitting apps, (iii) outcomes apps and (iv) ecological momentary assessment (EMA) apps. The Goldilocks app has enhancements in support of field studies. Additional information of Release 2019b can be found in the IEEE Access article “A Wearable, Extensible, Open-Source Platform for Hearing Healthcare Research.”, Pisha et. Al, 2019.

Guides and Documentation

OSP Getting Started Guide – This documents the steps needed to install and run OSP. Please follow the setup steps in order before proceeding to use the system.

Enbedded Webserver User (EWS) Guide – This guide offers instructions on testing the web-apps to make sure they are working properly. It also features instructions on customizing the web-apps for individual needs.

RT-MHA API– This documentation provides information about all of the possible functions the real-time sound processing engine is capable of.