What are "PSAP's"? Often they are high quality sound amplifying, listening solutions similar to hearing aids, but because they are not an FDA approved medical device, they can be more affordable. They are not replacements for hearing aids, but if you just need a boost to your hearing, they can be a more attractive solution. This article does a great job explaining more about PSAP's and SimpleEar offers several models that may help you hear better.
PSAPs are over-the-counter electronic products (they are not FDA approved medical devices like hearing aids) that come in many different shapes and sizes that will give your husband the ability to adjust the volume and tone so he can hear better in different situations.
It's also important to know that PSAPs work best for people with mild to moderate hearing impairment, you don't need a prescription to buy them, and they usually aren't covered by insurance or Medicare.