Usually it’s not exactly a speaker, but it does involve a controlled moving diaphragm. In a piezoelectric buzzer, a current applied to the diaphragm causes it to oscillate, and the size and shape of the diaphragm determines the tone AFAIK.
It may be theoretically possible to engineer such a device into a rudimentary speaker. I mean, people have done it with Tesla coils and player pianos, so hey, anything is possible?
If possible, work with a therapist for this kind of support.
You can rent a roll off dumpster from your local waste management company, and remove a lot in a matter of days. But if you are living with a hoarder, then the mess will just accumulate to fill the space you clear out in a couple months.
This is not a logistical problem, but a behavioral one.