Loudness monitoring

The volume meter (English Loudness Meter ) is one of the Aussteuerungsmessern. It is not designed to measure the acoustic volume, but under the control of the modulating audio levels.

Volume fluctuations in television and radio programs are not recognized with the widespread Aussteuerungsmessern as PPM and VU meters and therefore can not be avoided. It levels off after one of these instruments different dynamic recordings to " full scale " and hear them one after the other from, they are perceived as different noisy. One example is the volume difference between advertising and 20 - clock news on the public television channels.

The technical measurement of the perceived ( by the human ear ) volume requires a generally accepted method of measurement. Are one possible solution volume measuring instruments according to current standards by ITU BS.1770 and BS.1771 Rec. So far, this measurement method is not yet internationally recognized.

Devices

There are already several manufacturers that support their instruments, the volume measurement method ITU Rec BS.1770 / BS.1771, eg DK Technologies, RTW and penguin ( Pinguin Engineers ).

Devices whose operation falls under the term "AGC" (automatic gain control) use now as this measurement method. Well-known manufacturers of such devices, for example, Jünger Audio ( Level Magic ), TC Electronic ( DB4 / DB 8) and Dolby (LM 100).

Due to the dedicated manufacturer support the measurement method " ITU Rec BS.1770 / BS.1771 " may well in the future attain the rank of " internationally recognized method of measurement for volume ."

The EBU R 128 Directive is a technical code, which redefine the level control of radio and television programs. Of the public and private broadcasters in Germany it is applied from 31 August 2012.