Figure 17.5 (Quick Quiz 17.3) An ear trumpet, used before hearing aids to make sounds intense enough for people who were hard of hearing. You can simulate the effect of an ear trumpet by cupping your hands behind your ears.
Figure 17.5 (Quick Quiz 17.3) An ear trumpet, used before hearing aids to makesounds intense enough for people who were hard of hearing. You can simulate the effectof an ear trumpet by cupping your hands behind your ears.