Final answer:
A user with an average hearing loss of 60 dB would require the use of a hearing aid full time to assist with speech understanding and perception of higher frequencies.
Step-by-step explanation:
If the average loss is 60 dB, the user will typically require a hearing aid full time. Hearing loss of 60 dB is considered severe, and according to the information provided, a person with 60 dB loss will find speech seem indistinct and higher frequencies are not well perceived.
This level of hearing loss means that conversational sounds particularly from female voices which are higher in frequency would be very hard to understand without the assistance of a hearing aid. Further information indicates that a person with a 40 dB loss could still understand conversation although it would be very quiet. The amplification of sounds should be at a level that allows understanding without causing further damage particularly noting that sounds above 90 dB can lead to additional hearing loss.