نتایج جستجو برای: formant frequency patterns

تعداد نتایج: 872155  

Journal: :Journal of speech, language, and hearing research : JSLHR 2007
Houri K Vorperian Ray D Kent

PURPOSE This article integrates published acoustic data on the development of vowel production. Age specific data on formant frequencies are considered in the light of information on the development of the vocal tract (VT) to create an anatomic-acoustic description of the maturation of the vowel acoustic space for English. METHOD Literature searches identified 14 studies reporting data on vow...

2014
Ellen Marklund Iris-Corinna Schwarz Francisco Lacerda

The amplitude of the mismatch negativity response for acoustic within-category deviations in speech stimuli was investigated by presenting participants with different exemplars of the vowel /i/ in an odd-ball paradigm. The deviants differed from the standard either in terms of fundamental frequency, the first formant, or the second formant. Changes in fundamental frequency are generally more sa...

Journal: :The Journal of the Acoustical Society of America 2001
P Dissard C J Darwin

The two experiments described here use a formant-matching task to investigate what abstract representations of sound are available to listeners. The first experiment examines how veridically and reliably listeners can adjust the formant frequency of a single-formant sound to match the timbre of a target single-formant sound that has a different bandwidth and either the same or a different funda...

2004
Baris Bozkurt Thierry Dutoit Boris Doval Christophe d'Alessandro

This study presents a method for estimation of glottal formant frequency (Fg) from speech signals. Our method is based on zeros of z-transform decomposition of speech spectra into two spectra : glottal flow dominated spectrum and vocal tract dominated spectrum. Peak picking is performed on the amplitude spectrum of the glottal flow dominated part. The algorithm is tested on synthetic speech. It...

1982
Shinji Maeda

The acoustic wave propagation inside the vocal tract was simulated assuming plane waves. When an acoustic tube having appropriate area function but no side branching cavities was used as the nasal tract, the low frequency nasal formant below the first formant of low vowels as observed in natural speech could not be simulated. The relatively short nasal tract with both ends open cannot produce t...

2013
Imen Jemaa Kais Ouni Yves Laprie Slim Ouni Jean-Paul Haton Kaïs Ouni

In this paper we present a new formant tracking algorithm where the formant frequencies estimation was based on local maxima detection of a time frequency representation. This representation can be shown by a scalogram issued from a complex wavelet transform. The formant frequency candidates are validated as local maxima of scalogram which correspond to wavelet ridges. Then in the proposed algo...

2017
Tonmoy Ghosh Subir Saha H. M. Iftekharul Ferdous

To provide new technological benefits to the mass people, nowadays, regional and local language recognition draws attention to the researchers. Similarly to other languages, Bangla speech recognition scheme is demandable. A formant is considered as the resonance frequency of vocal tract. Formant frequencies play an important role for the purpose of automatic speech recognition, due to its noise...

2007
Manfred Pützer Wolfgang Wokurek

This study visualizes the glottal excitation in a temporally highly resolved estimate of the first formant. Instantaneous estimates during the glottal cycle of the frequency and bandwidth of the first formant closely follow the electroglottographic contour. This is demonstrated for phonation of an [a:] produced by one female patient with laryngeal dystonia. The observed contours in the F1 frequ...

2008
HASSAN FARSI

An adaptive time-domain postfiltering technique based on the synthesis LP filter factorisation is proposed. Information is gathered about the relation between the LP filter poles and formants for this factorisation. This technique shapes the main formant differently from the other formants. Pole locations representing the main formant are modified and optimum shaping constants for each formant ...

Journal: :the modares journal of electrical engineering 2008
davood gharavian

speech emotion can add more information to speech in comparison to available textual information. however, it will also lead to some problems in speech recognition process. in a previous study, we depicted the substantial changes of speech parameters caused by speech emotion. therefore, in order to improve emotional speech recognition rate, in a first step, the effects of emotion on speech par...

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