研究目的
Investigating the generation of audible sound based on vibrations produced by a laser beam synchronized to audible sound, and applied to an auricular cartilage for potential use in bone conduction hearing aids.
研究成果
The study demonstrated that vibrations produced by a laser beam synchronized to audible sound in a rubber sheet can generate audible sound, suggesting potential applications in bone conduction hearing aids. Optimizing the irradiation wavelength could enhance the system's effectiveness.
研究不足
The vibratory force level generated in the rubber sheet was below the threshold level transmitted to the specified mechanical coupler by up to 47 dB, indicating a need for optimization in wavelength selection to increase optical absorption rates.
1:Experimental Design and Method Selection:
The study involved measuring the effect of a laser beam synchronized to sound on a rubber sheet mimicking human soft tissue properties, using an acceleration sensor to detect vibrations.
2:Sample Selection and Data Sources:
A rubber sheet with similar acoustic and optical properties to human soft tissue was used.
3:List of Experimental Equipment and Materials:
Included a laser diode, glass fiber, MEMS microphone, preamplifier, acceleration sensor, and a rubber sheet.
4:Experimental Procedures and Operational Workflow:
The laser beam was modulated at various frequencies and directed at the rubber sheet, with vibrations measured using an acceleration sensor.
5:Data Analysis Methods:
The acceleration signal was Fourier transformed to analyze the amplitude spectrum, and the force level was calculated based on mechanical impedance and acceleration.
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