batanna.blogg.se

If the first candidate of a certain frame has a frequency of 0, or a frequency above ceiling, this frame is considered voiceless. The current pitch contour is determined by the path through all first candidates. The degree of periodicity of this candidate (between 0 and 1). The candidate's frequency in Hz (for a voiced candidate), or 0 (for an unvoiced candidate). The information about each candidate (see below).Įach candidate contains the following attributes: frequency The number of candidates in this frame (at least one: the “unvoiced” candidate). This is synonymous to the vocal vibratory rate, which is expressed in hertz (Hz). It is mutually reciprocal to period (T 0 ): fo 1/T 0 and T 0 1/ fo. The time associated with the last frame (i.e., x 1 + ( n x – 1) dx)) will also usually be in that range.Ī frequency above which a candidate is considered voiceless.Įach frame contains the following attributes: nCandidates Vocal fundamental frequency refers to the repetition rate of a recurring waveshape in the voice signal, i.e., the number of cycles per unit time in the vibration of the vocal folds. The time associated with the first frame, in seconds.

Time step = frame length = frame duration, in seconds. With Inspect, you will see the following attributes: x min Pitch & PointProcess: To PitchTier.: interpolate values at specified times.Pitch: To PitchTier: time-stamp voiced intervals.Sound & Pitch: To PointProcess (peaks).: near locations of high amplitude.Sound & Pitch: To PointProcess (cc): near locations of high amplitude.Pitch: To PointProcess: create points in voiced intervals.Sound: To Pitch (cc).: cross-correlation method.Sound: To Pitch (ac).: autocorrelation method (all parameters). Less invasively, an electroglottograph (also known as laryngograph) can be used to measure the electrical impedance through the neck at the level of the larynx.Sound: To Pitch.: preferred method (autocorrelation).It is sampled into a number of frames centred around equally spaced times. It does not mind whether this periodicity refers to acoustics, perception, or vocal-cord vibration. Pitch analysis.Ī Pitch object represents periodicity candidates as a function of time.