This website is generating enquiries about what to buy for someone who cannot use modern electronic hearing aids.
Here are some hints based on 20 years of collecting them. Would-be collectors should read
Caveat emptor.
I do not sell trumpets.
In general very small ear trumpets are not much use. A horn larger than the human ear is desirable.
The NHS offered several basic shapes that provide some improvement to hearing, but not an awful lot more than cupping one's hand over an ear. These items come up at auction quite regularly.
In addition I have added a modern reproduction trumpet that is readily available.
For the first 3 make sure the moulded ear tip is included.