Patent ID: 9608583
Date: 2017-03-28
CPC Classifications: G11B,H03G

Claim:
1. A method for adjusting sound volume of a recording, the method comprising: determining a maximum amplitude value for sound frequencies audible for the human ear in the recording, calculating a volume gain, for a specified sound level as being the root mean square of voltage values applied to a speaker for the recording, based on the ratio of the determined maximum amplitude value to a maximum amplitude value for all frequencies combined corresponding to the specified sound level, and reproducing the recording by automatically adjusting an amplification level based on the calculated volume gain to obtain the specified sound level, wherein the reproducing further comprises dynamically adjusting a sound level of the recording by authorizing a specified gain for low-pitched and/or high-pitched sounds in the recording, the specified gain corresponding approximately to the calculated volume gain applied during the reproducing of the recording.