Canta ITE’s Global Technical Operations March 2001 Johnny H. Hansen, GTO

2 Global Technical Operations January 2001 Contents Directional System Microphone alignment Dual Microphone Considerations Parallel microphone manufacture Front & Back microphone orientation ITE / Halfshell / ITC / CIC CIC Issues: Sizing Tool Removal Tool

3 Global Technical Operations January 2001 Directionality features. Digital Dynamic Directionality Digital Dual Microphone Technology Adaptive Directionality Active Microphone Matching

4 Global Technical Operations January 2001 Digital Dual Microphone Technology

5 Polar Pattern dB Front Back ~0 Angle Gain

6 Global Technical Operations January 2001 Different Polar Patterns Omnidirectional Cardioid Supercardioid Hybercardioid Bidirectional

7 Global Technical Operations January 2001 Polar Patterns Considerations The ratio of the internal electronic time delay and the external time delay. What determines the Polar Pattern of a Directional System ?

8 Global Technical Operations January 2001 Digital Dual Microphone Technology Time Delay -1 Front Back + Speed of Sound = 343 m/sec. Canta Microphone Spacing = 10 mm

9 Global Technical Operations January 2001 Dual Microphone ITE’s Front Back 10 mm Microphone spacing: 10 mm Microphone must be: Horizontal.

10 Global Technical Operations January 2001 Misaligned Microphones 30 o

11 Global Technical Operations January 2001 Effect of misaligned Microphones Actual mic. spacing Degrees misaligned mics. Act. mic.spacing = COS(B) Mic. spacing B a c COS(B) = caca

12 Global Technical Operations January 2001 Quiz Impression

13 Global Technical Operations January 2001 Answer to Quiz

14 Global Technical Operations January 2001 Importance of Placement Key

15 Global Technical Operations January 2001 Microphone Orientation Marking During impression taking a microphone placement key must be used in order to indicate the correct orientation of the microphones. Instruct the client to look straight ahead at a point at eye level. Place the placement key at a horizontal position.

16 Global Technical Operations January 2001 Parallel Microphone Manufacture 1 Make a marking on the investment according to marks from placement key Transport this marks to the shell

17 Global Technical Operations January 2001 Parallel Microphone Manufacture 2 Place the shell on the faceplate Align marks on shell with guidelines on faceplate Scratch a line around the shell Guidelines Scratched line Erase marks on shell Mount shell after scratched line

18 Global Technical Operations January 2001 Active Microphone Matching

19 Global Technical Operations January 2001 Active Microphone Matching ,2 dB Coyote dB Danalogic use matched microphones Digital 5000 match once with FONIX Canta is matched with FONIX and keeps the matching updated all the time. When changing microphone(s) or hybrid remember to match with FONIX

20 Global Technical Operations January 2001 Telecoils & Loop systems

21 Global Technical Operations January 2001 Telecoil 1000 times/sec. = 1kHz Voltmeter 1 sec. = 1 Hz.

22 Global Technical Operations January 2001 Telecoil Voltmeter In a solenoid the iron core is for collecting and rectifying the b-fields Flux = b-fields in an area

23 Global Technical Operations January 2001 Misaligned telecoil B-field

24 Global Technical Operations January 2001 Loop system Near field Few cm + - Magnetic field (b-field) + -

25 Global Technical Operations January 2001 Loop system - field intensity 1 m 2 m 1 m 2 m 10 dB 5 dB 0 dB

26 Global Technical Operations January 2001 Telecoil - measuring Coil Magnetic Field Lines Telecoil Magnetic Field Lines CoilTelecoil Frye Interacoustic

27 Global Technical Operations January 2001 Telecoil

28 Global Technical Operations January 2001 Mounting Telecoil - loop systems Turn on the instrument Listen to the instrument in Telecoil position Move the coil until noise from radiation is at minimum Observe that the coil is within scratched scratched line and in a vertical position Glue the coil in position

29 Global Technical Operations January 2001 Front / Back Microphone faceplate Left Right Front Back

30 Global Technical Operations January 2001 Front / Back Microphone - 13 faceplate Left Right Front Back

31 Global Technical Operations January 2001 ITE 740-D & 440-D Half-Shell Standard 312 battery Programmable Telecoil

32 Global Technical Operations January 2001 ITE 750-D & 450-D Full-Shell Option 13 battery (Full-Shell only)

33 Global Technical Operations January 2001 ITC 730 & 430 Standard 312 battery Option Size 10 battery Programmable Telecoil

34 Global Technical Operations January 2001 CIC 710 Standard Size 10 battery Removal Cord

35 Global Technical Operations January 2001 Canta CIC - Sizing Tool Sizing Tool Kit (P/N )

36 Global Technical Operations January 2001 Canta CIC - Removal Tool Complete CIC Shell, Faceplate and Removal Cord CIC Module Removal Tool Complete CIC Electronics Assembly: Receiver, Hybrid, Microphone, Contact Module and Battery Door

38 Global Technical Operations January 2001 Some More Information Maybe Another Point Other Standard Colors Still Some More Stuff And Some More Copper Color.