Comfortable sound design based on auditory masking with chord progression and melody generations using automatic composition

Unpleasant noise is a crucial problem, that we often face in daily life. One of such a problem is in the case of dental treatment. A dental instrumental noise that includes peaky components in the high-frequency band makes doctors and patients discomfort. To reduce discomfort, we proposed a method to mask unpleasant noise with a comfortable sound. The proposed method was automatically generating a comfortable cord progression. In previous subjective test results, it shows that degree of discomfort reduces. The remaining problem is that degree of comfort improves. This is due to the fact that the previous method utilizes the musical element of chord, but does not introduce the musical elements of melody and rhythm. Therefore, in this paper, we propose a new method to introduce the melody generation with automatic composition (AI composition) into the previous method based on the automatic generation of the chord progression. The proposed method automatically generates a chord progression to follow the peak frequency of dental treatment sounds and to add a melody following the chord progression with AI composition assistance tool to improve comfort and to design comfortable sound.