...This method is still used in modern records, and emphasis characteristics are indicated by the RIAA curve established by the Recording Industry Association of America (RIAA). Record materials have also been improved, from hard rubber to shellac, which was often used for standard playing records (SP records), and from around 1948, vinyl chloride was used for long playing records (LP records). The use of vinyl chloride in particular has significantly reduced the scratch noise caused by the needle rubbing against the record. *Some of the terminology explanations that mention "SP (record)" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…なお,この方法は現在のレコードにも採用され,エンファシスの特性はアメリカ・レコード工業会(RIAA)の定めるRIAA曲線によって示される。 レコード材料の改良も行われ,硬質ゴムから,SPレコード(standard playing record)によく用いられたシェラック,さらに,1948年ころからは,LPレコード(long playing record)に塩化ビニルが用いられるようになった。とくに塩化ビニルが用いられるようになると,レコード針が盤をこするときに生ずるスクラッチ・ノイズが著しく軽減された。… ※「SP(レコード)」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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