The<unk>  is the external portion of the<unk> , which consists of the pinna, concha, and auditory meatus. It gathers sound energy and focuses it on the<unk> drum (tympanic membrane). One consequence of the configuration of the external<unk>  is to selectively boost the sound pressure 30- to 100-fold for frequencies around 3000 Hz. This amplification makes humans most sensitive to frequencies in this range - and also explains why they are particulary prone to acoustical injury and hearing loss near this frequency. Most human speech sounds are also distributed in the bandwidth around 3 kHz.
Outer ear
Cauliflower ear
Ear canal
Lacrimal bone
Paranasal sinus
Lacrimal canaliculi
Dental alveolus
Nasolacrimal duct