1-7 of 7
Keywords: Inverse filtering
Close
Sort by
Journal Articles
Folia Phoniatr Logop (2002) 54 (3): 144–157.
Published Online: 22 July 2010
... extracted from glottal volume velocity waveforms estimated by inverse filtering. The ratio between f ac and d min (amplitude quotient, AQ), which gives an estimate of the closing time of the glottal flow, and its normalised version (NAQ) were computed. The NAQ values correlated strongly with the closing...
Journal Articles
Folia Phoniatr Logop (1997) 49 (5): 234–246.
Published Online: 09 December 2009
... and one in the afternoon) samples were recorded and analyzed. The glottal waveforms were obtained by inverse filtering of the acoustical signal using an automatic method. The following time-based parameters were analyzed from the estimated glottal flow waveform: (1) length of fundamental period (T); (2...
Journal Articles
Folia Phoniatr Logop (1997) 49 (5): 247–263.
Published Online: 09 December 2009
... (two in the morning and one in the afternoon) samples were recorded and analyzed. The glottal waveforms were obtained by inverse filtering of the acoustical signal using an automatic method. The following time-based parameters were analyzed from the estimated glottal now waveform: (1) length...
Journal Articles
Folia Phoniatr Logop (1995) 47 (6): 331–338.
Published Online: 09 December 2009
...-channel electroglottography from which the vertical larynx position was derived and (c) inverse filtering of the acoustic signal of vowel samples produced before and immediately after the exercise. Phonation into a tube seemed to cause a tendency to heighten the vertical laryngeal position. For female...
Journal Articles
Folia Phoniatr Logop (2008) 60 (5): 249–255.
Published Online: 02 September 2008
..., sadness, anger and a neutral emotional state. Equivalent sound level (L eq ), alpha ratio [SPL (1–5 kHz) – SPL (50 Hz–1 kHz)] and formant frequencies F1–F4 were measured. The [a:] samples were inverse filtered and the estimated glottal flows were parameterized with the normalized amplitude quotient [NAQ...
Journal Articles
Journal Articles
Folia Phoniatr Logop (2001) 53 (6): 338–350.
Published Online: 22 November 2001
... sample after three times 45-min vocal loading during the morning and a post-resting sample after a 45-min lunch break. The material recorded consisted of /pa:ppa/ words produced normally, as softly and as loudly as possible in this order. The long /a/ vowel of the test word was inverse-filtered to obtain...