**Core Concept**
Sensorineural hearing loss is a condition characterized by damage to the inner ear or the auditory nerve, resulting in impaired sound perception. Weber's test is a clinical tool used to assess lateralization of sound in patients with hearing loss, helping to differentiate between conductive and sensorineural hearing loss.

**Why the Correct Answer is Right**
In sensorineural hearing loss, the patient's ability to perceive sound is compromised, but the bone conduction of sound remains intact. When a 512 Hz tuning fork is struck and placed on the patient's forehead or mastoid process, the sound is perceived more intensely in the affected ear due to the relatively intact bone conduction pathways. This is because the damaged hair cells in the cochlea are unable to transmit sound signals to the brain, but the mechanical vibration of the skull allows the sound to be perceived more clearly in the affected ear.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because conductive hearing loss would result in the sound being lateralized to the better-hearing ear, not the affected ear. In conductive hearing loss, the middle ear's ability to conduct sound is impaired, so the sound would be perceived more intensely in the ear with normal middle ear function.

**Option B:** This option is incorrect because in unilateral sensorineural hearing loss, the sound would be lateralized to the affected ear, not the unaffected ear. The unaffected ear would perceive the sound more intensely due to its normal hearing function.

**Option C:** This option is incorrect because in central auditory processing disorders, the sound may be perceived as being louder or softer in one ear, but it would not be lateralized to the affected ear as seen in sensorineural hearing loss.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that in sensorineural hearing loss, Weber's test is lateralized to the affected ear, whereas in conductive hearing loss, it is lateralized to the better-hearing ear. This is a crucial differentiation to make in clinical practice.

**Correct Answer: B. The affected ear.**