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. Author manuscript; available in PMC: 2012 Jul 1.
Published in final edited form as: Ear Hear. 2011 Jul-Aug;32(4):468–484. doi: 10.1097/AUD.0b013e31820dd3f0

Table 7.

Norms for the Freedom HRTF.

Freedom Percentile
Condition 5 10 20 25 30 40 50 60 70 75 80 90 95 S.D.
Binaural Noise Front −2.8 −3.1 −3.6 −3.8 −4.0 −4.3 −4.5 −4.8 −5.1 −5.2 −5.4 −5.9 −6.3 1.1
Noise Side −10.3 −10.8 −11.4 −11.7 −11.9 −12.3 −12.6 −13.0 −13.4 −13.6 −13.8 −14.5 −15.0 1.4
Monaural Noise Front −3.1 −3.2 −3.4 −3.4 −3.5 −3.6 −3.7 −3.8 −3.9 −3.9 −4.0 −4.1 −4.3 0.4
Noise Sideipsilateral 0.4 0.1 −0.3 −0.5 −0.6 −0.9 −1.1 −1.4 −1.6 −1.8 −1.9 −2.4 −2.7 1.0
Noise Sidecontralateral −7.3 −7.7 −8.1 −8.3 −8.5 −8.8 −9.1 −9.3 −9.6 −9.8 −10.0 −10.4 −10.8 1.1
Noise Sidecontralateral- Noise Front −3.1 −3.6 −4.2 −4.4 −4.6 −5.0 −5.3 −5.6 −6.0 −6.2 −6.4 −7.0 −7.5 1.3
Head shadow −5.4 −6.0 −6.7 −6.9 −7.2 −7.6 −8.0 −8.4 −8.8 −9.0 −9.3 −10.0 −10.5 1.6
Binaural Benefit Spatial Release from Masking −6.9 −7.2 −7.5 −7.7 −7.8 −8.0 −8.3 −8.5 −8.7 −8.8 −9.0 −9.3 −9.6 0.8
ITD Spatial Release from Masking −1.7 −2.0 −2.4 −2.6 −2.7 −3.0 −3.2 −3.5 −3.7 −3.9 −4.0 −4.4 −4.8 1.0
ILD Spatial Release from Masking −3.8 −4.1 −4.5 −4.6 −4.7 −5.0 −5.2 −5.4 −5.6 −5.7 −5.9 −6.2 −6.5 0.8
Summation 1.2 0.8 0.2 0.0 −0.1 −0.5 −0.8 −1.1 −1.4 −1.6 −1.8 −2.3 −2.7 1.2
Squelch −0.5 −1.2 −2.0 −2.3 −2.5 −3.0 −3.5 −3.9 −4.4 −4.7 −5.0 −5.8 −6.4 1.8
ITD Squelch 3.3 2.8 2.3 2.1 1.9 1.6 1.3 1.0 0.7 0.5 0.3 −0.2 −0.6 1.2
ILD Squelch 1.6 1.2 0.7 0.5 0.3 −0.0 −0.3 −0.6 −0.9 −1.1 −1.3 −1.8 −2.3 1.2

All values are in dB.