Smoke alarm for deaf people

There is now a smoke alarm for deaf persons. It does not rely on flashing lights, but on a pungent odor to help those asleep wake up. Glad there is a smoke alarm that does not use a loud noise. It would be hard to convince companies to make it because it is expensive. It is far easier for an exec to say - that's impossible and you are crazy. We believe there are many uses for science. However, execs focus on making a profit and not on making a better universe.