Abstract
Recently, there has been a focus on improving the user’s emotional state by providing high-quality sound beyond noise reduction against industrial product noise. Three-dimensional computer aided design and computer-aided manufacturing (3D CAD/CAM) dental milling machines are a major source of industrial product noise in the dental environment. Here, we propose a noise-control method to improve the sound quality in the dental environment. Our main goals are to analyze the acoustic characteristics of the sounds generated from the dental milling machine, to control the noise by active noise control, and to improve the sound quality of the residual noise by synthesized new sound. In our previous study, we demonstrated noise reduction in dental milling machines through tactile transducers. To improve the sound quality on residual noise, we performed frequency analysis, and synthesized sound similarly as musical instruments, using the harmonic series noise model. Our data suggest that noise improvement through synthesis may prove to be a useful tool in the development of dental devices.
Highlights
Technological advancement has always benefitted the medical field, especially in the enhancement of the medical environment
The 3D Computer aided design and computer-aided manufacturing (CAD/CAM) milling machines work as a source of disruptive noise, as they add quite a cacophony to the dental environment
In this study, further experimentation was conducted to improve the the sound quality of the remaining noise based on the noise reduction results obtained in the previous sound quality of the remaining noise based on the noise reduction results obtained in the previous study
Summary
Technological advancement has always benefitted the medical field, especially in the enhancement of the medical environment. Recent amelioration in algorithmic science allows us to simulate and solve many ‘real system’ problems, previously inaccessible due to practical limitations such as including unknown dynamics and large or continuous state, action, and parameter spaces in data poor environments [1,2]. ‘Noise’ is one of the real system problems currently accessible through this method. Computer aided design and computer-aided manufacturing (CAD/CAM) milling has proven to be advantageous in various fields, through improved product design, higher productivity, better utilization, and stronger quality control [3]. Advanced CAD/CAM technologies have actualized precise and patient-customized prosthesis in the field of dentistry [4]. The 3D CAD/CAM milling machines work as a source of disruptive noise, as they add quite a cacophony to the dental environment
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