PRODUCT DATA Artificial Ear Types 4152 and 4153 Artificial Ear Types 4152 and 4153 have been designed for measurements in audiometry and related fields. They enable electroacoustical measurements on either insert earphones or headphones to be carried out under well-defined acoustical conditions, which are of great importance for the comparability of different designs and the reproducibility of measurements. Artificial Ear Types 4152 and 4153 consist of an acoustic coupler, a main housing containing the sockets for the connection of a Brüel & Kjær pressure-field microphone and a base plate with a mechanism for clamping the device under test (DUT). The clamping mechanism is spring loaded and provides a force that can be adjusted from 2 N (approximately 0.2 kg) to 10 N (approximately 1 kg) as recommended by the relevant ANSI standards. The actual force value is set on a scale engraved on the clamp holder. To minimize the effects of vibration during the measurements, each artificial ear is isolated from shock and vibration by means of three soft rubber feet. Uses and Features Uses • Frequency response and sensitivity measurements on insert earphones and headphones • Calibration of audiometers Conform to IEC and ANSI standards Complete reproducibility of results Well-defined measuring conditions 2 cm3 and 6 cm3 couplers Adjustable c

Artificial Ear Type 4152 In Artificial Ear Type 4152, the socket for mounting the measuring microphone permits use of 1 Pressurefield Microphone Type 4144 with ½ Preamplifier Type 2669-L and Adapter DB-0962. The couplers supplied with the artificial ear are: • 2 cm3 Coupler DB-0138 in accordance with IEC 60318–5 (formerly IEC 126 and IEC 60126) and ANSI S3.7–1995 for measurements on hearing aid earphones (see Fig. 1) • 6 cm3 Coupler DB-0913 that fulfils the requirements of the NBS 9A coupler (United States National Institute of Standards and Technology, formerly the National Bureau of Standards)...

Fig. 4 The adapters used with Type 4153 Earcap YJ-0305 with Adapter AQ-0015 (included) Adapter Ring DB-0742 (included) Prepolarized Version A modified version of Type 4153 is available for audiometer calibration using sound level meters with no polarization voltage. This version includes Prepolarized Pressure-field ½ Microphone Type 4947. Frequency Response of the Artificial Ears Fig. 5 shows the pressure frequency response of Artificial Ear Type 4153 measured with Microphone Type 4192 and Artificial Ear Type 4152 with the 6 cm3 Coupler DB-0913 measured with a 1 Pressure-field Microphone Type...

Specifications – Artificial Ear Types 4152 and 4153 Type 4152 Max. Force Applied to Top of Acoustic Coupler Coupler Acoustic Equivalent Volume Supported Microphone Size Preamplifier Included Relevant Standards Pinna Type Coupler Volumes Weight * Type 4153-W-001 includes Prepolarized ½Pressure-field Microphone Type 4947 TYPE 4153 CONNECTIONS Acoustic Resistance Acoustic Inductance Fig. 6 The electrical equivalent of the acoustic circuit Annular Slit Four Parallel Holes Ordering Information Type 4152 Artificial Ear includes the following accessories: 3 • DB-0138: 2 cm Coupler 3 • DB-0913: 6 cm...