The threshold of hearing may vary for different people and at different times for the same person, depending on age, physiological condition, and training.
Weecadka saamaynta wakhtigu way u kala duwanaan kartaa qof ilaa ka kale iyo wakhtiyada kala duwan ee qof isku mid ah, iyaddoo ku xidhan dawa qaadashada, goobta laga muddo, heer kulka jidhka iyo firfricoonida jidhka.