نتایج جستجو برای: acoustic intensity

تعداد نتایج: 263781  

2014
Sofoklis Kakouros Okko Johannes Räsänen

Various studies have examined the acoustic features in infant directed speech (IDS) and adult directed speech (ADS). However, there are few speech corpora with prominence annotation from multiple listeners or analysis of the acoustic properties of the stressed versus unstressed words, most studies and corpora focusing on syllabic stress. In order to fill this gap, the current study analyzes the...

2005
Petra Wagner

In order to gain knowledge about the interaction between topdown expectations of listeners concerning prosodic prominence and its acoustic correlates, two exploratory empirical studies were carried out. First, native and nonnative subjects rated prominences of speech read at normal and very fast —prosodically very different — speech. Later, these ratings were compared with introspective promine...

Journal: :The Journal of the Acoustical Society of America 2017
Eric B Whiting Joseph S Lawrence Kent L Gee Tracianne B Neilsen Scott D Sommerfeldt

Sound intensity measurements using two microphones have traditionally been processed using a cross-spectral method with inherent error in the finite-sum and finite-difference formulas. The phase and amplitude gradient estimator method (PAGE) has been seen experimentally to extend the bandwidth of broadband active intensity estimates by an order of magnitude. To provide an analytical foundation ...

Journal: :جنگل و فرآورده های چوب 0
حوری شریف نیا دانشگاه تربیت مدرس سعید کاظمی نجفی گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی ، دانشگاه تربیت مدرس مهدی احمدی نجف آبادی دانشگاه صنعتی امیر کبیر

with the aim of identifying failure mechanism in oriented strand boards, failure behavior of wood strands under tensile load was investigated using acoustic emission technique. resinated and unresinated strands were arranged at top, middle and bottom section of the board before pressing. tensile and acoustic emission tests were performed simultaneously on treated and control samples. using tens...

2004
Key-Seop Kim Un Lim Dong-Il Shin

This research aimed 1) to compare the results of scansion with those of an acoustic analysis, 2) to classify the problematic feet of cadence, which is identical to the foot types in casual speech, and 3) to clarify the relation of scansion to acoustic analyses. Additionally, it tried to establish the necessity and clarify what benefits of acoustic analyses will provide readers of poems with pro...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده مهندسی مکانیک 1393

اندازه گیری شدت صدا (sound intensity) برای تشخیص منابع نویز در یک مجموعه متراکم از قطعات در حال کار و مرتبط با یکدیگر در خودرو کابردهای فراوانی دارد. خوشبختانه بر اساس تلاشهای محققان [ j.y.chunf] and [f. j. fahy] سیستمی طراحی شده که میتوان بدون استفاده از اتاقک آکوستیک شدت صوت را با دقت خوبی در محیط های آزاد اندازه گیری کرد.

Journal: :The Journal of the Acoustical Society of America 1973

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