نتایج جستجو برای: feedback anc
تعداد نتایج: 150467 فیلتر نتایج به سال:
In helicopters, the low frequency noise generated by the rotors and engines often masks and jeopardizes safe communication. Additionally, pilots are likely to suffer from hearing damages due to the higher sound levels in the headset produced whencompensatingfor the noiseby increasedspeakerlevels. A feasible approach is to reduce the low frequency noise using active techniques, thereby enabling ...
This paper represents a short review on active noise control (ANC) with the emphasis on ANC systems implemented by using FxLMS adaptation algorithm. The physical mechanism behind active noise control, based on which local silence zones can be created is detailed. Basic configurations for realization of ANC systems are then introduced. It is shown that FxLMS algorithm has been widely used in dif...
the present study was concerned with exploring the frequency and linguistic focus of corrective feedback types given by novice and experienced female teachers working with young learners and compared it with those of elementary classes for adults. moreover, it aimed at measuring learners’ acknowledgement of teachers’ corrective feedback in the form of uptake in relation to linguistic coverage o...
Abstract In the contemporary society, ANC (active noise cancellation) technology has become more and popular. It grown from its originally military industry fields into commercial fields, it is still being implemented areas fields. this paper, we briefly introduce some principal of algorithms contrast their results with traditional ones focus on challenges for future applications.
BACKGROUND The use of antenatal care (ANC) varies between countries and in different settings within each country. Most previous studies of ANC in Vietnam have been cross-sectional, and conducted in rural areas before the year 2000. This study aims to compare the pattern and the adequacy of ANC used in rural and urban Vietnam following two cohorts of pregnant women. METHODS A comparative stud...
BACKGROUND Policymakers and program planners consider antenatal care (ANC) coverage to be a primary measure of improvements in maternal health. Yet, evidence from multiple countries indicates that ANC coverage has no necessary relationship with the content of services provided. This study examines the relationship between the timing of the first ANC check-up, a potential predictor of the conten...
BACKGROUND Evaluation of the quality of antenatal care (ANC) using indicators should be part of the efforts to improve primary care services in developing countries. The growing use of the electronic health record (EHR) has the potential of making the evaluation more efficient. The objectives of this study were: (a) to develop quality indicators for ANC and (b) to evaluate the quality of ANC us...
The aim of this study was to identify the socio-demographic characteristics, knowledge, attitude and accessibility factors related to the utilization of antenatal care (ANC) service among pregnant women in the Kham District, Laos. Data for this cross-sectional study were collected in July 2008, using a two-stage cluster sampling strategy from 24 selected villages in the Kham District. A total o...
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