نتایج جستجو برای: loudness level and sound pressure level
تعداد نتایج: 16965466 فیلتر نتایج به سال:
the current study examined iranian undergraduate efl students’ willingness to communicate with regard to their vocabulary knowledge. in general, participants were somewhat willing to communicate in english. the total mean score of 730 university students’ perception of willing to communicate was 83.53 out of 135. results, regarding four parts of willingness to communicate, revealed that part...
Background and aims: Discharging compressed air through conventional single jet nozzles or open pipes is a common jet noise in industry. This study is aimed to reduce air blow gun jet noise by designing and fabrication of multiple jet nozzle as a substitute for conventional single jet nozzles. Methods: One of the most common commercial air blow gun equipped with a conventional single j...
OBJECTIVES New signal processing technologies have recently become available for Baha® sound processors. These technologies have led to an increase in power and to the implementation of directional microphones. For any new technology, it is important to evaluate the degree of benefit under different listening situations. METHODS Twenty wearers of the Baha osseointegrated hearing system partic...
this study was intended to analyze the listening tapescripts of the elementary and pre-intermediate levels of total english textbooks from the pragmatic dimension of language functions and speech acts in order to see whether the listening tasks are pragmatically informative or not. for this purpose, 8 conversations from the two books were selected randomly, and then, the two pragmatic models of...
The ISO 3382-3 standard uses the measurable sound pressure based parameters D 2,S and L p ,A,S,4 m to describe acoustic properties of open-plan offices. As yet however, no treatment measurement uncertainty these according Guide expression Uncertainty in Measurement (GUM) is be found peer-reviewed literature. This technical note therefore describes how can declared GUM. mathematical framework pr...
testing plays a vital role in any language teaching program. it allows teachers and stakeholders, including program administrators, parents, admissions officers and prospective employers to be assured that the learners are progressing according to an accepted standard (douglas, 2010). the problems currently facing language testers have both practical and theoretical implications but the first i...
the ability to speak two languages in the world is a remarkable achievement. there is a good reason to believe that bilingualism is the norm for the majority of people in the world because 70% of the earth’s population are supposed to be bilingual or multilingual. various investigations have shown that the native language impacts foreign word recognition, and this influence is adapted by the de...
Long-term exposure to high levels of vibration and noise can have detrimental effects on the health tractor drivers. This study aimed evaluate subjective comfort experienced by drivers operating large-horsepower tractors. A total 10 tractors sourced from 5 different manufacturers were subjected testing. The assessment encompassed three operational conditions, namely, idle, maximum torque, rated...
Loudness discomfort levels (LDLs) were measured in dB HL and SPL at discrete frequencies between 500 to 4000 Hz on 31 hearing-impaired ears using TDH-50P and ER-3A earphones. The results revealed no significant differences in the measured sound pressure level (SPL) between the two earphones at all test frequencies. However, with dB HL measurements, statistically significant differences were rev...
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