DIN 45538-1969DIN 45539-1981DIN 45546-1981DIN 45547-1981DIN 45548-1980DIN IEC 60A(CO)89-1986
适用范围
The standard applies to analogue audio disk records and the corresponding professional and domestic reproducing equipment. It excludes amplifiers and loudspeakers, methods of measurement for which can be found in IEC 268-3 and IEC 268-5 respectively. It also excludes all aspects of quality grading, which can be found in IEC 581-3.