This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hearing Loss, Subject name: ENT
All are subjective tests for audiometry except: 
Select and explain. 
A. Tone decay, B. Impedance audiometry, C. Speech audiometry, D. Pure tone audiometry
B: Impedance audiometry
Answer: B: Impedance audiometry 
Explanation: (b) Impedance audiometry(Ref. Scott Brown, 6th ed., Vol 2; 2/12/1)Impedance audiometry is an objective test. It does not require the cooperation of patient.Other objective audiometry tests are; OAEs, Electrocochleography and BERA