色々と調べてみると、あたりまえですが、CDプレーヤー自体、高周波成分の再生機能が無い事もわかってきました。 驚いたのは、スピーカーさえ、CDの再生周波数に合わせて作られている物もあったということです。 しかし、この高周波成分を補正するアンプも出ていることがわかりました。 残念ながら、この補正機能付きアンプで再生したCDの音楽とLPを再生で再生した音楽との間で差が生じないという論文は見つかりませんでした。 余談ですが、「α波が出る」というキャッチフレーズのCDで実験するとどんな結果が出るのでしょうね? "Sounds by CD doesn't make the effect to increase α-EEG power " I was taught me by the man who work together last year. I've found the paperA study on the difference of the sound quality between LP sound and CD sound -physiological and KANSEI scientific approach. There is not description that Sounds by CD doesn't make the effort to increase α-EEG power,but in this paper I understand its meaning that sounds of LP makes us more relax. If I listen the fovorite music,there is difference effect without mind.... Then I had tried to listen the music in LP,but my analog audio system was broken.
I have wanted to import the music from LP to PC.Today I've foundCreative Media USB Sound Blaster Digital Music SX,LX. There is the explanation as "it easy to convert a record or tape collection to CD or MP3, removing hiss and crackles at the same time" and the web for Japanese about SX "canconvert the high wuolity sound in professional stuio as 24bit/90Khz" It may makes me the effect to increase α-EEG power. It will be sold on March,I will try it.
some amps that makes the high frequency components from CD has already been on commertial. But I could not found the paper about the difference of the effects for α-EEG power between LP and New amp. Sometime the CD titled to increase the α-EEG power are found,I wonder what kind of results appear.