I recall reading that in the human female, the lower part of the hearing range expands with age. Older women (especially apartment dwellers, it seems) tend to be the first one's to complain about too much bass. I've chatted informally with local cops and they confirm that most of the calls they respond to in re the local noise ordinance are from older females, and the complaints commonly involve low-end sounds the officers not infrequently can barely hear.