Investigations in acoustics, electroacoustics and signal processing

声学、电声学和信号处理研究

基本信息

  • 批准号:
    6027-2007
  • 负责人:
  • 金额:
    $ 1.17万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2007
  • 资助国家:
    加拿大
  • 起止时间:
    2007-01-01 至 2008-12-31
  • 项目状态:
    已结题

项目摘要

My aim is to support the audio engineering community with basic research in acoustics, electroacoustics, measurement tools, and signal processing.  It is motivated both by personal curiosity and a genuine desire to help the industry.  This area is multidisciplinary, drawing on physics, mathematics and engineering.  Projects chosen for study derive from contact with prospective graduate students, industry, and personal priorities.   Completed research is (a) a study of the benefits of a high magnetic field strength (high Bl) on the power efficiency of normal cone loudspeakers, especially the combined benefits of high Bl in combination with switching or class-D amplifiers, (b) a study of the acoustic centre of normal sealed-box monopolar loudspeakers, particularly relevant to understanding how loudspeakers act in rooms, and (c) measurement of acoustic surface impedance with a new, accurate and rapid method.  Newly-proposed loudspeaker research will be chosen from several areas: (i) further work on acoustic surface impedance measurements, (ii) a study of the acoustic nonlinearities that are responsible for the poor performance of concentric speaker systems, involving the acoustics of moving boundaries, and (iii) study of viscoeleastic loudspeaker damping and the inertia of the moving air near the cone.   For over 20 years a colleague and I have worked on dither, which is the addition of noise to a quantizer to turn its distortion and noise modulation into benign low-level noise.  These studies have influenced the way digital audio has flourished.  Properly dithered systems have infinitely fine signal resolution and no noise modulation, becoming truly analog in their behaviour.  We will apply these same concepts to image processing, extending these studies to different forms of dither in multi-bit image processing as well as partial dithering in low-bit half-toning.   An ongoing peripheral project is a study of the propagation of acoustic waves in concrete and other civil engineering solids, in order to detect flaws and cracks.
我的目标是通过声学、电声、测量工具和信号处理方面的基础研究来支持音频工程社区。这是出于个人的好奇心和帮助行业的真诚愿望。这个领域是多学科的,涉及物理学、数学和工程学。选择学习的项目来自与未来研究生、行业和个人优先事项的接触。 完成的研究是(a)高磁场强度(高BI)对普通锥形扬声器的功率效率的益处的研究,特别是高BI与开关或D类放大器组合的组合益处,(B)普通密封盒单极扬声器的声学中心的研究,特别是与理解扬声器在房间中如何起作用有关的研究,以及(c)用一种新的、准确和快速的方法测量声表面阻抗。新提出的扬声器研究将从以下几个领域中选出:(i)关于声表面阻抗测量的进一步工作,(ii)对造成同心扬声器系统的不良性能的声学非线性的研究,涉及声学的移动边界,和(iii)研究的粘弹性扬声器阻尼和惯性的移动空气附近的圆锥。 20多年来,我和我的一位同事一直致力于抖动的研究,抖动是将噪声添加到量化器中,将其失真和噪声调制转化为良性的低电平噪声。这些研究影响了数字音频的蓬勃发展。适当的抖动系统具有无限精细的信号分辨率,并且没有噪声调制,在其行为中成为真正的模拟。我们将把这些相同的概念应用于图像处理,将这些研究扩展到多位图像处理中的不同形式的抖动以及低位半色调中的部分抖动。 一个正在进行的外围项目是研究声波在混凝土和其他土木工程固体中的传播,以检测缺陷和裂缝。

项目成果

期刊论文数量(0)
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科研奖励数量(0)
会议论文数量(0)
专利数量(0)

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Vanderkooy, John其他文献

Vanderkooy, John的其他文献

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{{ truncateString('Vanderkooy, John', 18)}}的其他基金

Investigations in acoustics, electroacoustics and signal processing
声学、电声学和信号处理研究
  • 批准号:
    6027-2007
  • 财政年份:
    2011
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in acoustics, electroacoustics and signal processing
声学、电声学和信号处理研究
  • 批准号:
    6027-2007
  • 财政年份:
    2010
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in acoustics, electroacoustics and signal processing
声学、电声学和信号处理研究
  • 批准号:
    6027-2007
  • 财政年份:
    2009
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in acoustics, electroacoustics and signal processing
声学、电声学和信号处理研究
  • 批准号:
    6027-2007
  • 财政年份:
    2008
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in acoustics, electroacoustics and signal processing
声学、电声学和信号处理研究
  • 批准号:
    6027-2000
  • 财政年份:
    2004
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in acoustics, electroacoustics and signal processing
声学、电声学和信号处理研究
  • 批准号:
    6027-2000
  • 财政年份:
    2002
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in acoustics, electroacoustics and signal processing
声学、电声学和信号处理研究
  • 批准号:
    6027-2000
  • 财政年份:
    2001
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in acoustics, electroacoustics and signal processing
声学、电声学和信号处理研究
  • 批准号:
    6027-2000
  • 财政年份:
    2000
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in electroacoustics and signal processing
电声学和信号处理研究
  • 批准号:
    6027-1996
  • 财政年份:
    1999
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual
Investigations in electroacoustics and signal processing
电声学和信号处理研究
  • 批准号:
    6027-1996
  • 财政年份:
    1998
  • 资助金额:
    $ 1.17万
  • 项目类别:
    Discovery Grants Program - Individual

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