This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Lombard&;s test is used in diagnosis of 
Select and explain. 
A. Conductive hearing loss, B. Sensorineural hearing loss, C. Mixed hearing loss, D. Non-organic hearing loss
D: Non-organic hearing loss
Answer: D: Non-organic hearing loss 
Explanation: Lombard&;s test: This test is based on "Lombard&;s principle". This principle says that one raises his / her voice when speaking in the noisy environment. While performing this test, the patient is allowed to read a book. Noise is introduced into the ear. The noise is gradually increased till the patient raises his / her voice or stops the process of reading. If there is no change in voice loudness level the patient does not have a functional hearing defect.