Detecting Silent Vocalizations in a Locked-In Subject

Table 2

Results of analysis of lower beta band peaks during Silent Singing. PSD% and frequencies are listed as the average result of all trials. “Latency” indicates the time (sec) after the speak onset signal in which the beta peak was evident. Minimum time segment indicates the period in which the beta peak was still visible.

	No. Peaks during sing	Peak latency (secs)	PSD%	Peak frequency (Hz)	Minimum data time segment (ms)
Tone C5
Session 1	6	4.92	0.479	15.5	300
Session 2	7	1.44	0.607	14.7	231
Session 3	9	4.14	0.517	15.3	185
Tone C4
Session 1	3	3.17	0.673	13.8	183
Session 2	4	4.75	0.515	16.3	163
Session 3	8	3.17	0.412	15.4	272
Silence
Session 1	2	1.50	0.349	16.0	375
Session 2	1	5.50	0.901	15.1	150
Session 3	3	3.30	0.582	14.6	283