Mention four (4) prerequisites for a systematic audiological assessment.

1. Comprehensive medical history: A detailed medical history is essential to understand the patient's overall health, any past ear-related issues, and any medications that may affect hearing.

2. Otoscopic examination: A visual inspection of the ear canal and eardrum is necessary to rule out any visible abnormalities or blockages that may affect hearing.

3. Pure-tone audiometry: This test measures the softest sounds a person can hear at different frequencies, providing information on the degree and type of hearing loss.

4. Speech audiometry: This test evaluates the patient's ability to understand speech at different volume levels, helping to assess the patient's speech discrimination abilities and overall communication skills.

1. Comprehensive case history
2. Otoscopy
3. Tympanometry
4. Pure-tone audiometry