P. C. Pandey

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This paper presents the study of phonemes in the Indian languages for developing good quality speech synthesis. Harmonic plus noise model (HNM) which divides the speech signal in two sub bands: harmonic and noise, is implemented with the objective of studying its capabilities and to investigate the adaptation needed. Childers and Hu's algorithms are used(More)
Audiometry is the technique to identify and quantitatively determine the degree of hearing loss of a person by measuring his hearing sensitivity, so that suitable medical treatment or one of the appropriate hearing aids and assistive devices can be prescribed. In audiological investigations, the hearing sensitivity is tested for pure tones, speech or other(More)
A novel pH sensor suitable for use in both aqueous and non-aqueous mediums is reported. The sensor is derived from polymer modified electrode obtained from electrochemical polymerisation of aniline in dry acetonitrile containing 0.5 M tetraphenyl borate at 2.0 V versus Ag/AgCl. The light yellow colour polymer modified electrode obtained under the present(More)
Estimation of the vocal tract shape has applications in articulatory synthesis, speech recognition, and speech-training aids. LPC based analysis can be used to obtain the vocal tract shape during speech segments produced with glottal excitation and with fixed as well as transitional tract configurations. During the stop closures of vowel-consonant-vowel(More)
Speaker transformation uses a mapping between the signal parameters derived from a set of phrases spoken by two speakers to modify the speech signal of one speaker to make it perceptually similar to that of the other speaker. In spectral warping and interpolation technique, the transformation function can be estimated using lesser data, but it needs a(More)
Atmospheric liquid water, particularly in the form of rain, produces anomalies in the radar altimetric range measurements. Such features are observed as sudden large changes in radar backscatter as a means of identification. To quantify the rain that radar altimetric pulses encounter, the instantaneous rain estimation capability of the nadir looking(More)
Spectral masking occurs when the perception of one sound is affected by the presence of another sound like noise or unwanted sound of the same duration as the original sound. Earlier studies have shown that binaural dichotic presentation, using a pair of linear phase FIR comb filters with complementary magnitude responses, helps in reducing the effect of(More)
A spiral shaped plastic optical fiber (POF) has been constructed and applied for sensing of the refractive index of a sucrose solution. The sensing mechanism is based on evanescent wave interaction between the light travelling within the fiber and the medium surrounding it. Difference in output voltage is observed as the concentration of sucrose solution is(More)
We present the ultrafast switching property in one dimensional defect photonic crystals theoretically, owing the mechanism of transmittance. By analyzing the transmittance of electromagnetic waves through the defect photonic crystal with the help of simple transfer matrix method, it is found that the defect layer in the photonic crystal can be induced the(More)
Audiometry is the technique to identify and quantitatively determine the degree of hearing loss of a person by measuring his hearing sensitivity, so that suitable medical treatment or one of the appropriate hearing aids and assestive device can be prescribed. In audiological investigations, the hearing sensitivity is tested for pure tones, speech or other(More)