Table 2.

Masker Level for Different Maskers Frequencies for Each Tinnitus Frequency Group.

	Mean frequency (Hz)	PTC level (dB SPL)	TTC level (dB SPL)	Mean difference: TTC−PTC at F0 (dB)
All patients (n = 32)
F−1	2764	72.1	65.6	−5.8
F−1/2	3866	62.3	60.1	−2.2
F−1/4	4598	58.6	59.0	0.4
F−1/8	5014	52.7	57.4	4.8
F0	5468	50.0	59.4	9.4
F+1/8	5962	53.3	63.3	10.1
F+1/4	6503	65.8	65.6	−0.2
F+1/2	7686	77.8	69.1	−8.7
Low-frequency tinnitus (n = 8)
F−1	677	69.0	65.1	−3.9
F−1/2	957	55.4	56.9	1.5
F−1/4	1138	47.5	52.3	4.8
F−1/8	1241	39.9	52.3	12.4
F0	1353	35.9	51.9	16.0
F+1/8	1476	38.1	56.8	18.6
F+1/4	1609	51.6	54.1	2.5
F+1/2	1899	67.8	53.0	−14.8
Medium-frequency tinnitus (n = 11)
F−1	2568	78.1	68.4	−7.7
F−1/2	3632	66.3	62.0	−4.3
F−1/4	4319	62.2	61.7	−0.5
F−1/8	4710	55.1	59.8	4.7
F0	5136	53.5	64.5	11.0
F+1/8	5601	58.6	64.2	5.6
F+1/4	6108	67.9	69.1	1.2
F+1/2	7137	79.9	69.9	−10.0
High-frequency tinnitus (n = 13)
F−1	4213	69.3	63.8	−5.6
F−1/2	5855	63.2	60.5	−2.6
F−1/4	6963	62.5	60.9	−1.5
F−1/8	7593	58.5	58.6	0.1
F0	8281	55.8	59.8	4.0
F+1/8	9030	58.1	66.7	8.6
F+1/4	9848	72.6	69.7	−2.9
F+1/2	11711	82.3	78.5	−3.8
Noise-like tinnitus (n = 15)
F0	5050	44.1	60.3	16.2
Tone-like tinnitus (n = 17)
F0	5837	55.2	58.7	3.4

Note. PTC = psychophysical tuning curves; TTC = tinnitus tuning curves.