CBL - Campus del Baix Llobregat

Projecte llegit

Títol: Enmascaramiento de acúfenos mediante técnicas de procesado digital

Estudiants que han llegit aquest projecte:

Director/a: MONTORO LÓPEZ, GABRIEL

Departament: TSC

Títol: Enmascaramiento de acúfenos mediante técnicas de procesado digital

Data inici oferta: 28-11-2024     Data finalització oferta: 28-06-2025


Estudis d'assignació del projecte:
    GR ENG SIS TELECOMUN
Tipus: Individual
 
Lloc de realització: EETAC
 
Paraules clau:
Tinnitus, acúfenos, procesamiento digital de señales, filtro notch, ruido blanco, enmascaramiento sonoro
 
Descripció del contingut i pla d'activitats:
Actualmente se está investigando la aplicación de técnicas de procesado digital al enmascaramiento de acúfenos.
 
Overview (resum en anglès):
Tinnitus is the perception of sound without any external source, affecting millions of people worldwide and significantly reducing their quality of life. Since there is no universally effective treatment, alternative approaches such as sound masking are being explored. This bachelor's thesis proposes a digital signal processing (DSP)-based system aimed at reducing tonal tinnitus perception through personalized notch filtering.

The methodology included identifying the tinnitus frequency through subjective matching with pure tones, generating different noise types (white, pink, brown, and modulated), and applying a notch filter centered on the target frequency. The entire system was developed in MATLAB, where spectral analysis and patient trials were conducted to evaluate the effectiveness of each configuration.
Additionally, an experimental implementation in Python was tested to filter ambient noise in real time using a microphone input, with a focus on minimizing latency and maintaining audio quality.

Results showed that masking was effective during playback in most sessions, especially when using white noise, which was also rated as the most comfortable by the subject. However, the persistence of the effect after the sound stopped (known as residual inhibition) was less consistent and varied depending on multiple factors.
Overall, the system proved to be flexible, user-adaptable, and well-tolerated, suggesting its potential as a complementary therapeutic tool. As a future improvement, the development of a mobile application is proposed, allowing users to intuitively configure the parameters and enabling use in both clinical and home settings.

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