Most pitch excited channel vocoders require the fundamental or laryngeal frequency of the input speech to be present if the output speech is to be of high quality. In order to determine if speech whose fundamental is absent can have its pitch accurately restored so as to be used as an input to a vocoder, a computer simulation was performed. The fundamental was restored by passing the speech thr...

Introduction  Pitch-matching refers to the ability to vocally reproduce an acoustic model in a corresponding tone to the presented sound. This ability, which is dependent on pitch perception ability, can vary among individuals, and some are not able to sing in the correct tune or discriminate differences between tones. Objective  To correlate pitch-matching accuracy and auditory processing in i...

This paper describes the investigation of manipulating positions in a speech pitch when lengthening or shortening the pitch period, that is, lowering or raising fundamental frequency of speech. The experimental results revealed that the preferable positions were at the first half of the pitch period for pitch shortening, and at the second half of it for pitch lengthening. The findings are expec...

Associations between auditory pitch and visual elevation are widespread in many languages, and behavioral associations have been extensively documented between height and pitch among speakers of those languages. However, it remains unclear whether perceptual correspondences between auditory pitch and visual elevation inform these linguistic associations, or merely reflect them. We probed this c...

Introduction In computed tomography (CT) technology, an optimal radiation dose can be achieved via changing radiation parameters such as mA, pitch factor, rotation time and tube voltage (kVp) for diagnostic images. Materials and Methods In this study, the brain, abdomen, and thorax scaning was performed using Toshiba 16-slice scannerand standard AAPM and CTDI phantoms. AAPM phantom was used for...

Single staggered is a design development of normal wire and tube heat exchanger that wires are welded with staggered configuration on two sides. Capacity of wire and tube heat exchanger is the ability of the heat exchanger to release heat. The objective of this study is to analyse the effect of wire pitch (pw) on capacity of single staggered wire and tube heat exchanger. The research...

Pitch glide is a continuously rising or falling characteristic of pitch contour in tonal languages, such as Mandarin Chinese, and is critical for tonal speech comprehension. An interesting but unanswered question is whether pitch glide can be automatically processed at a preattentive stage in the brain. To address this question, we used iterated rippled noise (IRN) as a linguistically meaningle...

Several query-by-humming techniques have been proposed for content-based music retrieval. Reliable pitch extraction from humming is critical for such music retrieval systems to work well. Previous pitch detection methods are based on music note segmentation. Such methods require a user to separate each music note with silence or hum with specific syllables; otherwise the segmentation errors can...

In this work, we have studied the effect of pitch variations across the speech signals in context of automatic speech recognition. Our initial study done on vowel data indicates that on account of insufficient smoothing of pitch harmonics by the filterbank, particularly for high pitch signals, the variances of mel frequency cepstral coefficients (MFCC) feature significantly increase with increa...