نتایج جستجو برای: acoustic signal processing

تعداد نتایج: 883367  

2014
Keke Yu Ruiming Wang Li Li Ping Li

The accurate perception of lexical tones in tonal languages involves the processing of both acoustic information and phonological information carried by the tonal signal. In this study we evaluated the relative role of the two types of information in native Chinese speaker's processing of tones at a preattentive stage with event-related potentials (ERPs), particularly the mismatch negativity (M...

2017
Steve Renals Pawel Swietojanski

This chapter reviews distant speech recognition experimentation using the AMI Corpus of multiparty meetings. The chapter compares conventional approaches using microphone array beamforming followed by single-channel acoustic modelling with approaches which combine multichannel signal processing with acoustic modelling in the context of convolutional networks.

2016
Alberto Izquierdo-Fuente Juan José Villacorta-Calvo Lara del Val Puente Luis Suárez

This paper proposes a scalable and multi-platform framework for signal acquisition and processing, which allows for the generation of acoustic images using planar arrays of MEMS (Micro-Electro-Mechanical Systems) microphones with low development and deployment costs. Acoustic characterization of MEMS sensors was performed, and the beam pattern of a module, based on an 8 × 8 planar array and of ...

2011
Claudia Freigang Lucas Schmidt Jan Wagner Rahel Eckardt Elisabeth Steinhagen-Thiessen Arne Ernst Rudolf Rübsamen

The present study focuses on auditory discrimination abilities in older adults aged 65-89 years. We applied the "Leipzig inventory for patient psychoacoustic" (LIPP), a psychoacoustic test battery specifically designed to identify deficits in central auditory processing. These tests quantify the just noticeable differences (JND) for the three basic acoustic parameters (i.e., frequency, intensit...

2013
Timothy F. Duda

The long-term goal is to better understand fluctuating sound propagation in two distinct ocean acoustic regimes: Stratified shallow water, where sound is highly bottom interacting, and the temperate deep-ocean sound channel. Acoustic field fluctuations have time scales varying from less than a minute to hours, and horizontal spatial scales from tens of meters to kilometers, comparable to proces...

2017
Stefano Fasciani

We propose an approach to insert physical objects in audio digital signal processing chains, filtering the sound with the acoustic impulse response of any solid measured in real-time. We model physical objects as a linear time-invariant system, which is used as an audio filter. By interacting with the object or with the measuring hardware we can dynamically modify the characteristics of the fil...

Journal: :Yearbook of Medical Informatics 2002

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی برق 1387

در تحقیقات کنونی برای پردازش و تحلیل محتوای سیگنال های صوتی، طبقه بندی و قطعه بندی صوت به مسئله مهمی تبدیل شده است. متمایزسازی گفتار-موسیقی بعنوان دو کلاس مهم از سیگنال های صوتی یکی از مهم ترین شاخه ها در این زمینه است که کاربردهای بسیاری از جمله بعنوان پیش پردازش سیستم های بازشناسی گفتار خودکار، شاخص گذاری و بازیابی بر اساس محتوای صوت و تصویر، بهبود کدینگ صوت و مدیریت آرشیوهای صوتی دارد. بنابر...

Multi-transmitter multi-receiver passive radar, which locates target in the surveillance area by the reflected signals of the available opportunistic transmitter from the target, is of interest in many applications. In this paper, we investigate different signal processing scenarios in multi-transmitter multi-receiver passive radar. These scenarios include decentralized processing of reference ...

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