[KeplerBoy]

bluetooth is a digital transmission. The volume is encoded in the signal, it can't get louder just because it receives a clearer signal.

Unless the reduced power consumption by the transceiver causes the battery voltage to rise noticeably.

[sgerenser]

Empirical evidence says otherwise. Bluetooth headphones on desk, can hardly hear anything. Touching my head (particularly the ears), loud and clear.

[KeplerBoy]

Ohh, I need to work on my sarcasm detector.