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Masking

Masking for assessment

QuestionAnswer
What is the formula for masking using the Plateau Technique for air conduction? AC(nte) + 10dB
What is the formula for masking using the Plateau Technique for bone conduction? AC(nte) + 10dB + OE
What is the formula for masking using the Step Procedure for air conduction? AC(nte) + 30dB
What is the formula for masking using the Step Procedure for bone conduction? AC(nte) + 20dB + OE
What are the OE values for 250 Hz, 500 Hz, and 1k Hz? 250 Hz = 15dB; 500 Hz = 15 dB; 1k Hz = 10 dB
What is the over-masking formula? BC(te) + IA + 5 dB
What is the formula to decide if you need to mask for SRT? Unmasked SRT(te) - Best Bone (nte) >40 dB (60 dB)
What is the formula for masking for SRT? PTA (ac of nte) + 30 dB
What is the formula to decide if you need to mask for Word Recognition? PL(te) - Best BC(nte) > 40dB (60 dB)
What is the Katz method for masking for Word Recognition? PL(te) - 30 dB + Average A/B Gap(nte)
What is the Simplified Yacullo Method for masking for Word Recognition? PL(te) - 20 dB
What is the Formula Method for masking for Word Recognition? M(min) = PL(te) - IA + Maximum A/B Gap(nte) and M(max) = Best BC(te) + IA - 5 dB; M(mid) = M(max) + M(min)/2
When should the Simplified Yacullo Method be used? 1) No A/B gaps equal to or greater than 15dB in either ear and 2) speech is presented at a moderate level (30-40 dB SPL)
What are the IA values for supra-aural earphones? 125 Hz = 35 dB; 250 Hz = 40 dB; 500 Hz = 40 dB; 1k Hz = 40 dB; 2k Hz = 45 dB; 4k Hz = 50 dB; 8k Hz = 50 dB
What are the IA values for insert earphones? 125 Hz - 1k Hz = 75dB and 2k Hz- 8k Hz = 50 dB
What are the clinical values used for IA? 40 dB for supra-aural earphones and 60 dB for inserts
Created by: duda713