Most of the results from the internal memory of the hearing aids I have fitted (datalogging) shows that an overwhemly number of clients use 95% only one program. Generally you have the aid set so that speech is optimize. The purpose of a dedicated program is to have the aid re calibate for an specific listening need. One example is music, many authors suggest to set the aid linear, no feedback cancellation or noise reduction when listeing to music. With this adjustmenst you should be able to enjoy a better music experience.
However, if you were to use those adjustment in your daily day life you would probably be complaining about the sound of the aid. Hence the need of a Program…
The market trend is to have automatic products, for example the newer products coming are all going to have auto telefone where they will automatically switch from M to T…
An interesting application are the new high end instruments, I will talk about Siemens e to e and oticon Rise arquitecture.
For example, it is interesting that for example you can program the rigth aid for volume control and the left for program
so when you press the right up BOTH right and left will increase in volume (gain) and when you press the aid in the other ear both of them are going to change the progam (pretty cool right)
Most aids have not also a mute function if you press the program change for a 5 sec or something…
Finally, I have always suggests remote controls if the manufactures makes it.
Phonak has very discrete remote controls disguised as a key so that if you are in need to raise your volume, people wont guess what you are doing