AP BIOLOGY

Detailed explanation-1: -The vibrations from the eardrum set the ossicles into motion. The ossicles are actually tiny bones-the smallest in the human body. The three bones are named after their shapes: the malleus (hammer), incus (anvil) and stapes (stirrup). The ossicles further amplify the sound.

Detailed explanation-2: -The mean middle ear gain is about 20 dB between 250 and 500 Hz, reaching a maximum of about 26.6 dB around 1KHz and then decreasing at about 8.6 dB per octave at frequencies to near zero gain at 7 KHz and above.

Detailed explanation-3: -When the tympanic membrane vibrates, it causes motion in these three small bones, called ossicles, which then conduct the sound mechanically. The three ossicles act to amplify sound waves, although most of the amplification comes from the size of the tympanic membrane relative to the oval window.

Detailed explanation-4: -The eardrum vibrates. The vibrations are then passed to 3 tiny bones in the middle ear called the ossicles. The ossicles amplify the sound.