Min IA is frequency specific
These are the Min IA tables for TDH-39 and Otometrics Inserts used in the Masking Assistant
1
.
Min IA (supraaural phone: TDH-39), frequency specific
Hz dB
125 35 Katz & Lezynski, (2002)
250 48 Munro & Agnew, BJA (1999)
500 44 Munro & Agnew, BJA (1999)
750 40 N/A - fulfill traditional approach
1000 48 Munro & Agnew, BJA (1999)
1500 40 N/A - fulfill traditional approach
2000 44 Munro & Agnew, BJA (1999)
3000 56 Hall J.W. III & Mueller G.H. III / Munro & Agnew, BJA (1999)
4000 50 Katz J / Munro & Agnew, BJA (1999)
6000 44 Hall J.W. III & Mueller G.H. III / Munro & Agnew, BJA (1999)
8000 42 Katz J / Munro & Agnew, BJA (1999)
Min IA insert phone
Hz dB
125 60 N/A - traditional value
250 72 Munro & Agnew, BJA (1999)
500 64 Munro & Agnew, BJA (1999)
750 60 N/A - traditional value
1000 58 Munro & Agnew, BJA (1999)
1500 60 N/A - traditional value
2000 56 Munro & Agnew, BJA (1999)
3000 58 Munro & Agnew, BJA (1999)
4000 72 Munro & Agnew, BJA (1999)
6000 54 Munro & Agnew, BJA (1999)
8000 62 Munro & Agnew, BJA (1999)
1
Katz, J., Lezynski, J. (2002). Clinical Masking. In J. Katz, ed., Handbook of Clinical Audiology, Williams and Wilkins, Bal-
timore. Munro, K.J., Agnew, N. A comparison of inter-aural attenuation with the Etymotic ER-3A insert earphone and
the Telephonics TDH-39 supra-aural earphone. Br J Audiol 1999; 33: 259-262. Hall, JW., MUELLER, HG. (1997). The audi-
ologists’ desk reference, Volume I., Singular Publishing Group, San Diego.
Otometrics - AURICAL Aud
15
12 The Masking Assistant
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