| 摘要 |
PURPOSE:To easily evaluate and grade the ability to sing at low cost by comparing the distance between a microphone and the mouth of a singing person with the sound volume value of melody data as a good example of singing. CONSTITUTION:At places(a)-(c) where the sound volume of the melody data on music to be sung is larger than a reference value V0, the singing person should sing nearby the microphone so that a loud voice is outputted from a speaker. Therefore, proper singing is evaluated when the distance L between a proximity switch and the mouth of the singing person is less than the reference value L0 at the places (a)-(c), but improper singing is decided when the distance is larger than the L0 is decided and points are deduced. At places (d) and (e) where the sound volume V of the music to be sung is smaller than the reference value V0, on the other hand, the singing person should sing at a distance from the microphone so that a small voice is outputted from the speaker or should not sing. Therefore, proper singing is decided when the distance L is larger than the reference distance L0 at the places (d) and (e), but improper singing is decided when smaller than L0 and points are deduced. |
