Question

for supra-aural headphones, the typical interaural attenuation value is:

40 db
80 db
60 db
20 db

Explanation:

Identify the transducer type

The question asks for the typical interaural attenuation (IA) value for supra-aural headphones.

Recall clinical audiometry standards

In clinical audiology, the conservative minimum interaural attenuation value established for supra-aural headphones (such as TDH-39/49) across standard test frequencies is \(40\text{ dB}\).

Match with the given options

Comparing the standard value of \(40\text{ dB}\) to the choices:

• \(40\text{ dB}\) (Correct)
• \(80\text{ dB}\) (Typically associated with insert earphones)
• \(60\text{ dB}\) (Incorrect)
• \(20\text{ dB}\) (Incorrect)

Answer:

• (A) 40 dB (Correct answer)
• (B) 80 dB
• (C) 60 dB
• (D) 20 dB