Measuring the Constants of Ear Simulators
An ear simulator produces an acoustic transfer impedance similar to a real ear. It has a cylindrical volume corresponding to an average adult ear canal and acoustic impedance similar to an average normal eardrum adjacent to a microphone at one end. Devices so constructed are intended to improve the agreement between earphone calibrations and their performance on human ears. A sequence of measurements and analysis is described for establishing that the ear simulator meets acoustic impedance specifications. The results of the measurements serve as a basis for accepting an ear simulator of this type as a standard device for calibrating earphones. Most laboratories have instruments needed to record earphone responses with ear simulators. These can be used to make the necessary impedance measurements.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members, $5 for AES members and is free for E-Library subscribers.