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Advanced FM: Programming & Verification

Advanced FM: Programming & Verification. Deborah Edwards, MS,CCC-A Dawn Ruley, AuD, CCC-A. Overview. Introduction to FM FM Verification Procedure Tour of FM Successware. What is a wireless FM system?. 1. The teacher or primary speaker wears a wireless microphone called the transmitter.

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Advanced FM: Programming & Verification

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  1. Advanced FM: Programming & Verification Deborah Edwards, MS,CCC-A Dawn Ruley, AuD, CCC-A

  2. Overview • Introduction to FM • FM Verification Procedure • Tour of FM Successware

  3. What is a wireless FM system? • 1. The teacher or primary speaker wears a wireless microphone called the transmitter. • 2. The student wears a miniature FM receiver. This receiver picks up the teacher’s signal. The receiver may be worn alone on the ear or attached to a hearing aid or cochlear implant. 2 1

  4. Frequency standard • 216 – 217 MHz-band (also called N-Band)North and South America • 23 Channels available • Received Primary Status from the FCC 2003 for ALD

  5. Why FM? Why does someone need FM if he/she already wears hearing aids?

  6. Three Obstacles for HA Users • Background Noise • Reverberation • Distance from the sound source

  7. FM Priorities • Audibility of person wearing FM transmitter/microphone • Audibility of self • Audibility of others at a variety of distances Lewis and Eiten, Boystown

  8. SNR at ear level for different technologies No FM Traditional FM Dynamic FM 40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 SNR (dB) 40 45 50 55 60 65 70 75 80 85 Surrounding Noise (dB SPL)

  9. No FMTraditional FMDynamic FM

  10. 100 90 80 70 60 50 Speech understanding [%] 40 30 20 10 0 No FMTraditional FMDynamic FM

  11. 100 90 80 70 60 50 Speech understanding [%] 40 30 20 10 0 No FMTraditional FMDynamic FM

  12. 100 90 80 70 60 50 Speech understanding [%] 40 30 20 10 0 No FMTraditional FMDynamic FM

  13. 100 90 80 70 60 50 Speech understanding [%] 40 30 20 10 0 No FMTraditional FMDynamic FM

  14. 100 90 80 70 60 50 Speech understanding [%] 40 30 20 10 0 No FMTraditional FMDynamic FM

  15. 100 90 80 70 60 50 Speech understanding [%] 40 30 20 10 0 No FMTraditional FMDynamic FM

  16. 100 90 80 70 60 50 Speech understanding [%] 40 30 20 10 0 No FMTraditional FMDynamic FM

  17. Fitting the New Standard Receiver comes standard at +10 dB Default settings are a good beginning, but what comes next…. • When should you measure? • What should you measure? • How should you measure? • What should you change? • Do you need more equipment?

  18. The Phonak FM Offset Procedure (POP) • (FM)M65 • FM(M)65 • (FM)HA90 • FM(M)90 • Match target • Transparent with curve 1 • Not exceed MPO targets • Not to exceed MPO targets NOTE: (M) means muted environmental mic (FM) means muted FM mic

  19. Worksheet FM(M)65 curve (dB) * (FM)M65 curve

  20. Resources • www.phonak.com • www.eschooldesk.com • www.FMeLibrary.com • FM Successware 4.3 • POP Procedure found in FM Successware 4.3 – Guidelines

  21. Thank you

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