Augmented Acoustic Reality Realized Through Hear-Through Device: With emphasis on platform development

Bovbjerg, Christoffer ; Egedal, Rune

4. term

Acoustics and Audio Technology, Master

2014

2014-06-02

109

Denne kandidatopgave i akustik og audioteknologi udvikler en åben platform til hear-through/gennemhøringsenheder, som lader brugeren høre omgivelserne, mens lyden kan tilføjes eller bearbejdes i realtid. Arbejdet kombinerer teori og praksis: Det forklarer rumlig hørelse (hvordan vi retningsbestemmer lyd) til brug for implementering af virtuelle lydkilder, og præsenterer et komplet design i både software og hardware. Hardwaren består af to separate enheder: en gennemhøringsenhed og en behandlingsplatform. Systemets kalibrering/equalisering er udviklet på baggrund af omfattende målinger, der tager højde for, hvordan ørets form påvirker lyden (auricular transfer functions), og for ikke-lineær adfærd i transducere som mikrofoner og højttalere. En central målsætning er høj transparens, altså at den gennemgående lyd opleves så naturlig som muligt. Platformen er åben og kan genbruges til flere typer signalbehandlingsopgaver inden for akustik. Alle delsystemer er testet og verificeret. Rapporten indeholder en fuld brugervejledning samt en skabelon, der kan understøtte fremtidig forskning i gennemhøringsenheder og udvidet akustisk virkelighed.

This master’s thesis in Acoustics and Audio Technology develops an open platform for hear-through devices that let users hear their surroundings while audio can be added or processed in real time. It combines theory and practice: it explains spatial hearing (how we locate sounds) to implement virtual sound sources, and presents a complete software and hardware design. The hardware is built as two separate units: a hear-through device and a processing platform. System calibration/equalization is based on extensive measurements that account for how the outer ear shapes sound (auricular transfer functions) and for nonlinear behavior in transducers such as microphones and loudspeakers. A key goal is transparency—making the pass-through sound as natural as possible. The platform is open and reusable for a range of acoustic signal-processing tasks. All subsystems are tested and validated. The report includes a full user guide and a template to support future research in hear-through devices and augmented acoustic reality.

[This abstract was generated with the help of AI]

Hear-Through Device ; Augmented Acoustic Reality

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