Beyond the reverberation distance, loudness stays constant while reverberance increases.

Evidence

Beyond the reverberation distance the total field remains approximately constant, so that the perceived loudness does not essentially decrease, but the sound is perceived to be more reverberant since the direct sound level decreases. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 289

Categorization

• corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 289