Subscribe to Our Youtube Channel
Related Manuals for GRAS 43AA
Summary of Contents for GRAS 43AA
- Page 1 Instruction Manual 43AA Ear Simulator Kit According to IEC 60318-1 & -2 43AA-S2 CCP Ear Simulator Kit According to IEC 60318-1 & -2 www.GRASacoustics.com LI0066 – 1 June 2022...
- Page 2 Any technical documentation that is made available by GRAS is the copyrighted work of GRAS and is owned by GRAS. The content in this document is subject to change without notice. GRAS Sound & Vibration A/S is not liable or responsible for any errors or inaccuracies that may appear in this document.
-
Page 3: Table Of Contents
Contents Introduction .................. 4 Components ....................4 TEDS Compatibility ..................5 Additional Equipment ................. 5 Test Procedure ................6 Overview: The 4 stages of the Test Procedure ..........6 1: Setting up the Test Jig ................8 2: Calibration ..................... 8 3: Mounting the Earphone on the Test Jig ............. -
Page 4: Introduction
Introduction The 43AA and 43AA-S2 Ear Simulator Kit are complete test jigs for acoustically testing telephone handsets and earphones and complies with the following international requirements: IEC 60318 Electroacoustics – Simulators of human head and ear, Part 1 & 2 ... -
Page 5: Teds Compatibility
Fig. 2. 43AA shown with mounting plate GR0339 for testing circumaural earphones TEDS Compatibility The prepolarized versions of ear simulator kits (43AA-S2 and 43AA-S10) are IEEE 1451.4 TEDS v. 1.0 compliant. If your measurement platform supports Transducer Electronic Data Sheets (TEDS), you will be able to read and write data like properties and calibration data. -
Page 6: Test Procedure
12AK Power Module Fig. 3. Block diagram of a complete set-up for making tests with the 43AA. With the 43AA-S2, the 12AL or 12AQ Power module must be used, unless you connect directly to the CCP input of the computer/analyzer. -
Page 7: 1: Setting Up The Test Jig
Circum-aural earphone Telephone handset Fig. 4. Some examples of mounting the earphone on the test jig With the 43AA assembled, e.g., as shown in Fig. 3 and everything switched on, proceed as follows: Power Module Connect the free end of the preamplifier cable to the Input socket. Connect, via a suitable cable, the BNC Output to the input of the analyzer. -
Page 8: 3: Mounting The Earphone On The Test Jig
3: Mounting the Earphone on the Test Jig You may have to detach the earphone from its yoke before proceeding. Place the earphone centrally on the mounting plate so that it transmits directly into the Ear Simulator. Note: For circumaural earphones, use the concentric circles on the mounting plate GR0339 for guidance. - Page 9 Collar O-ring Entrance to Pistonphone coupler Fig. 5. Calibration using the Pistonphone. a) Unscrew Pistonphone collar and remove O-ring. b) Place coupler over microphone, push gently down to microphone stop c) Switch on Examples of test results using swept tones and ⅓ octave band analysis are shown below. Fig.
- Page 10 Caution! When attaching Preamplifier RA0001 to the micro- phone, use only gentle Base screw. finger force. Use coin to slacken/tighten Fig. 8. Exploded view of the user-serviceable components of the 43AA/43AA-S2 (mounting plates omitted for clarity) LI0066 – 1 June 2022...
-
Page 11: Warranty, Service And Repair
CE marking directive: 93/68/EEC WEEE directive: 2002/96/EC RoHS directive: 2002/95/EC GRAS Sound & Vibration continually strives to improve the quality of our products for our custom- ers; therefore, the specifications and accessories are subject to change. LI0066 – 1 June 2022... -
Page 12: Appendix
The RA0039 is delivered as shown in Fig. 9. An exploded view of its user-serviceable compo- nents is shown in Fig. 10. It uses a ½″ pressure microphone such as the GRAS 40AG with a 26AK ½” Preamplifier or ¼″ Preamplifier 26AC fitted with RA0001 Adapter. If ordered with a microphone, the RA0039 will be calibrated with the specific microphone and delivered with the resulting calibration chart. -
Page 13: Characteristics
Characteristics The acoustic input impedance of the RA0039 closely resembles that of the human ear and, as a result, loads a sound source in very much the same way. The RA0039 embodies a number of carefully designed volumes connected via well-defined and precisely tuned capillary tubes.
Need help?
Do you have a question about the 43AA and is the answer not in the manual?
Questions and answers