A Novel Dentary Bone Conduction Device Equipped with Laser Communication in DSP

Area of Science:

• Biomedical Engineering
• Audio Signal Processing
• Laser Communication

Background:

• Bone conduction systems offer an alternative to traditional audio transmission.
• Existing bone conduction technologies face challenges in signal clarity and noise reduction.

Purpose of the Study:

• To design and validate a dentary bone conduction system utilizing laser audio transmission.
• To develop and implement a real-time digital filter algorithm for enhanced audio processing.
• To evaluate the impact of digital signal processing (DSP) on audio output quality.

Main Methods:

• Designed a laser audio transmitter and receiver system.
• Developed a digital signal processing (DSP) system with a real-time digital filter algorithm.
• Utilized piezoelectric sensors to measure bone conduction transducer (BCT) vibrations.
• Measured signal-to-noise ratio (SNR) for both filtered and unfiltered audio outputs using CMU ARCTIC database audio.

Main Results:

• The digital filter algorithm successfully ran on the DSP in real time.
• The signal-to-noise ratio (SNR) of the digitally filtered audio output was double that of the unfiltered output.
• Significant improvement in the output quality of the bone conduction transducer (BCT) was observed.

Conclusions:

• The proposed dentary bone conduction system effectively transmits and receives audio via laser.
• Integration of a DSP-based digital filter substantially enhances sound quality and SNR.
• This technology presents a promising advancement for bone conduction audio systems.