This separates the middle ear from the inner ear; and its movements are reflected in vibrations in the fluid in the inner ear; these vibrations cause microscopic hairs to move, which send signals to the frog's brain. A frog's lungs are also involved in the reception of sound, although they are less sensitive than the frog's ear drums.
This distinguishes the middle ear from the inner ear; and its movements are reflected in oscillations within the fluid of the inner ear; these oscillations trigger minute hair movements, which transmit signals to the frog's brain. The frog's lungs also participate in sound reception, although they are less responsive than the frog's eardrums.