Objavljen
This standard specifies the electrical characteristics of a U-weighting filter mainly for use with sound level meters meeting the requirements of IEC 651 for the measurement of audible sound in the presence of ultrasound.
OBJAVLJEN
IEC 61012:1990 ED1
60.60
Standard objavljen
31. 1. 1990.
NAPUŠTEN
IEC 61012 ED2