Patent ID: 11950090
Assignee: AAC MICROTECH (CHANGZHOU) CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The method as described in claim 2, wherein determining the equal loudness curve difference between the current volume level and the baseline volume level according to the audio signal gain difference, and the current volume level and the baseline volume level, includes steps of:
calculating the sound pressure level of the in-car preset reference position at the reference frequency point according to the baseline volume level, and further calculating the equal loudness curve corresponding to the baseline volume level;
determining the equal loudness curve corresponding to the current volume level according to the equal loudness curve corresponding to the baseline volume level and the audio signal gain difference;
calculating the equal loudness curve difference between the current volume level and the baseline volume level according to the equal loudness curve corresponding to the baseline volume level and the equal loudness curve corresponding to the current volume level.