Due to the close coupling of earphones to the ears and the acoustic transmission paths involved, headphone measurements are complicated. This 26-page application note discusses these challenges, headphone types, measurement standards, headphone acoustics, acoustic test fixtures required for measuring headphones, and the practical aspects of headphone measurements. Objective measurements are also discussed. For the manufacturing or production test of headphones and earbuds, make sure to check out the APx517B acoustic analyzer.
