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The ear is divided into three parts: the external, middle and inner ears. The transmission of sound takes place in the external and middle ears. The inner ear houses the cochlea (organ of hearing) and the peripheral vestibular system (organ of balance)
The ear is structurally and functionally partitioned into three parts that are required for normal hearing: the outer inner, middle ear, and the inner ear—the latter is further divided into the vestibular labyrinth and cochlea (Figure 1). These are discussed in detail below.
Who diagnoses and manages ear and hearing problems? 3 Module 1 MECHANISM OF HEARING AND ANATOMY OF THE EAR 5 1.1 Parts of the ear 8 1.2 Structure and function of the outer ear 9 1.3 Structure and function of the middle ear 10 1.4 Structure and function of the inner ear 12 1.5 Facial nerve 13 1.6 How do we hear? 13 Module 2
Outer Ear. • The visible part of the ear is called the Pinna or the Auricle. The pinna is made of cartilage. • The outer ear is concerned with the transmission of sound. • The outer ear consists of the Pinna, the ear canal and the outer layer of the eardrum, also called the Tympanic membrane.
The outer and middle ears work together as a non-ideal (frequency-dependent) transformer between the acoustic impedance (the ratio between the pressure and volume velocity) of the air and that of the incompressible uid of the cochlea. The middle ear also functions as a mechanical lever
The outer or external ear is divided into two parts: the pinna or auricle, and the external auditory meatus. (a) The pinna. ternal ear is the pinna or auricle. This is formed of irregular-shaped cartil. ge covered by firmly adherent skin. The dependent lobule is mainly fat. Anteriorly the cartilage forms the tragus, which covers the entra.
The ear consists of three parts: the external, mid-dle, and internal ear. All three parts play an essen-tial rule in the hearing function of the ear. The auricle concentrate (collects and localizes) the sound waves from different directions and directs them to the ear canal, then into to the middle, and then into the cochlea.
