How loud is low frequency noise

When it comes to assessing noise, the conventional wisdom is that the loudness of a sound will correlate well with its perceived annoyance. On this basis, the A-weighted sound pressure level is also assumed to correlate with the potential percieved annoyance of a sound. This might well be a reasonable assumption for mid range frequency sounds. But for low frequency sounds, particularly below 63 Hz, the assumption that loudness is correlated highly with perceived annoyance breaks down. Indeed, while loudness adaptation may occur for low frequency sound, the annoyance can increase with time. Thus, with time, the annoyance may keep increasing while the apparent loudness decreases!