Frequency Characteristics of Sea Noise and Fish's Sound

Lung Sound Noise Reduction Using Gabor Time-Frequency Masking

The Gabor expansion is a mathematical tool, which provides a joint time-frequency representation of a given signal by decomposing it into time-frequency elementary signals called Gabor atoms. It has been used in a variety of signal processing applications, including biomedical signal processing. In this paper we present a time-frequency masking technique based on Gabor expansion for both heart ...

A Narrowband Sound Signal Frequency Estimation with Impulsive Noise Filtering

The new stochastic approach of impulsive noise filtering, based on the input sample separation by modified clusterization criterion, is proposed. It is shown that preliminary filtration by the proposed procedure provides robust narrowband sound frequency estimation and eliminates failures of the estimation algorithm caused by the impulsive noise.

Low Frequency Noise Characteristics of Multimode and Singlemode Laser Diodes

Low-frequency and Tonal Characteristics of Transformer Noise

Electricity substations and their associated transformers are necessary for community power needs. In NSW these substations are often located in rural areas where background noise is low. Noise ‘hum’ from the transformers can be an issue for residents located nearby to the substation, and the tonal and low-frequency nature of the noise can add to the annoyance. The NSW Industrial Noise Policy a...

effect of bataine and sulphate supplement on wool and milk characteristics and lambs performance in naine ewes

تعداد 20 رأس میش نژاد نائینی 6+-24 ماهه، با میانگین وزن 2/3-+40 کیلوگرم، همراه با 20 رأس بره های آنها در قالب طرح کاملا تصادفی اثر بتائین و مکمل سولفات بر خصوصیات شیر و پشم و عملکرد بره ها بررسی شد. میش ها بطور تصادفی در چهار تیمار قرار گرفتند. تیمارها عبارت بودند از: 1-گروه شاهد 2-بتائین (05/0 درصد ماده خشک) 3-سولفات (24/0 سولفور درصد ماده خشک 4-بتائین هرماه با سولفات. جیره غذائی طبق nrc با مح...