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IEEE Transactions on Audio and Electroacoustics

Issue 2 • June 1972

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Displaying Results 1 - 14 of 14
  • [Front cover and table of contents]

    Publication Year: 1972, Page(s): 0
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    Freely Available from IEEE
  • Guest editorial

    Publication Year: 1972, Page(s): 109
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1972, Page(s): c4
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    Freely Available from IEEE
  • Low-noise FET input amplifier for applications in the audio and subaudio frequency ranges

    Publication Year: 1972, Page(s):164 - 171
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    A low-noise FET input amplifier is described, which has been designed to be used in all physical measurements where high internal resistance sources are employed and exceptional noise performances of the amplifier, from a few hertz to some hundred kilohertz, are required. The noise figure of the amplifier is less than 0.5 dB at 10 Hz for source resistances ranging from 30 kΩ to 10 MΩ. Th... View full abstract»

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  • Time domain design of nonrecursive least mean-square digital filters

    Publication Year: 1972, Page(s):155 - 158
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A time-domain method is presented for designing nonrecursive digital filters that are optimum in the sense that the output samples are least mean-square estimates of the samples of some desired signal. The method requires that one know the input autocorrelation function and the cross-correlation function between the input and the desired output. Several examples are given of filters designed by th... View full abstract»

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  • On designing sharp cutoff low-pass filters

    Publication Year: 1972, Page(s):138 - 141
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Effects of introducing single or multiple pairs of coincident j\omega axis zeros in all-pole Chebyshev filter transfer functions are investigated. It is shown that for the same order n , Chebyshev filters with finite j\omega axis zeros provide much sharper cutoff than all-pole Chebysh... View full abstract»

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  • Segmentation of utterances of a known phrase using linear threshold techniques

    Publication Year: 1972, Page(s):142 - 150
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    A procedure utilizing linear threshold techniques for segmenting utterances of a single known phrase has been implemented. The technique utilizes several weight vectors derived in an iterative manner and temporal information between various designated speech events to perform segmentation. Accuracy results ranging from 100 to 92 percent have been achieved on nondesign data and are considered to be... View full abstract»

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  • Stability of two-dimensional recursive filters

    Publication Year: 1972, Page(s):158 - 163
    Cited by:  Papers (242)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    We discuss some aspects of the stability problem in two-dimensional recursive filtering. In particular, we derive a simplified version of a stability theorem due to Shanks and show that it is equivalent to some results of Ansell. We also give several examples of stability tests and pose a few unsolved problems. View full abstract»

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  • Stability and synthesis of two-dimensional recursive filters

    Publication Year: 1972, Page(s):115 - 128
    Cited by:  Papers (236)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1280 KB)

    Two-dimensional recursive filters are conveniently described in terms of two-dimensional z transforms. The designer of these filters faces two fundamental problems, their stability and their synthesis. Stability is determined by the location of the zero-valued region of the filter's denominator polynomial. A conjecture based on a one-dimensional stability theorem leads to a useful empirical stabil... View full abstract»

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  • A simple design of maximally flat delay digital filters

    Publication Year: 1972, Page(s):112 - 114
    Cited by:  Papers (26)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The problem of maximally flat delay design of recursive digital filters has been solved by Thiran, using a direct z-domain approach. In this paper, the solution is obtained in a much simpler way by making use of the familiar bilinear transform s of the variable z. A suitable continued fraction expansion available in the mathematical literature is shown to lead immediately to the required solution.... View full abstract»

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  • Digital inverse filtering-a new tool for formant trajectory estimation

    Publication Year: 1972, Page(s):129 - 137
    Cited by:  Papers (75)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    A new algorithm, based upon a digital inverse filter formulation, is presented and shown to be quite useful for estimating resonance or formant structure of voiced speech. The output of the algorithm is a set of raw data corresponding to peak frequencies versus time which is then used to estimate the first three and sometimes four continuously varying formant trajectories. Although an algorithm fo... View full abstract»

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  • Interactive minimax design of linear-phase nonrecursive digital filters subject to upper and lower function constraints

    Publication Year: 1972, Page(s):171 - 173
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The general Remes exchange algorithm and its implementation are discussed briefly An analog of the exchange algorithm is applied to the problem in which upper and lower constraints are imposed on the frequency response of a nonrecursive digital filter with linear phase. A typical design example is presented with rather tight constraints in the passband View full abstract»

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  • Measurement of the directivity characteristics of loudspeakers and microphones in a reverberant enclosure

    Publication Year: 1972, Page(s):151 - 154
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Continuous automatic recordings of the directivity patterns at various frequencies have been obtained for loudspeakers and microphones placed in a reverberant enclosure. Tone bursts and electronic gating have been used to simulate free-field conditions. This method appears to give results as accurate as those obtained in an anechoic chamber. The lowest measurement frequency of the directivity patt... View full abstract»

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  • A bound on limit cycles in fixed-point implementations of digital filters

    Publication Year: 1972, Page(s):110 - 112
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    We present an upper bound on the rms value of self-sustained limit cycles in fixed-point implementations of digital filters. The bound can be easily evaluated for the important special case of sections of order two, and simulation results for this case show that the bound is a useful tool. View full abstract»

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Aims & Scope

This Transactions ceased production in 1973. The current retitled publication is IEEE Transactions on Signal Processing.

Full Aims & Scope