**Core Concept**
The auditory cortex, located in the temporal lobe, is responsible for the perception and interpretation of sound, not the detection of sound waves. While the cochlea and auditory nerve transduce sound into neural signals, the cortex is essential for understanding speech, recognizing patterns, and assigning meaning to auditory stimuli.

**Why the Correct Answer is Right**
Bilateral destruction of the auditory cortex results in the loss of sound interpretation, such as understanding speech or identifying sounds, even though the patient can still perceive sound. The primary function of the auditory cortex is not sound detection but **semantic interpretation** and **sound pattern recognition**. Patients retain basic hearing (via cochlear function) but cannot interpret what they hear — a condition known as **auditory agnosia**.

**Why Each Wrong Option is Incorrect**
Option A: Hearing sensation (audibility) is preserved because the peripheral auditory pathway (cochlea, auditory nerve) remains intact. Deafness refers to loss of perception, not interpretation.
Option B: Frequency discrimination is handled by the cochlea and brainstem nuclei, not the cortex. The cortex does not selectively lose high-frequency hearing.
Option D: Sound localization relies on the brainstem (e.g., superior olivary complex) and cortical processing, but orientation is not primarily dependent on the auditory cortex.

**Clinical Pearl / High-Yield Fact**
The auditory cortex is critical for **interpreting speech and complex sounds**, not detecting sound. A patient with cortical deafness can hear sounds but cannot understand them — a key distinction between peripheral and central hearing loss.

✓ Correct Answer: C. Deficiency in interpretation of sounds