IEEE Transactions on Audio and Electroacoustics

Volume 17 Issue 3 • September 1969

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Displaying Results 1 - 12 of 12
  • [Front cover and table of contents]

    Publication Year: 1969, Page(s): 0
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1969, Page(s):187 - 189
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  • On digital replica correlation algorithms with applications to active sonar

    Publication Year: 1969, Page(s):190 - 197
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (743 KB)

    The fast Fourier transform is employed in the design of replica correlation algorithms for application in narrow-band and wide-band active FM sonar. A discrete analog of the narrow-band heterodyne correlator is presented and modified such as to lead to an efficient technique for wide-band FM where several time-compressed references are required. View full abstract»

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  • Estimation of coherence spectrum of non-Gaussian time series populations

    Publication Year: 1969, Page(s):198 - 201
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (357 KB)

    Previous work on computation of coherence estimates between two time series and the confidence intervals about these estimates has always assumed that the time series have a Gaussian probability density function. Here a Monte Carlo study was performed, computing coherences and confidence intervals upon non-Gaussian time series. Using both a rectangular distribution and a x<sup>2</sup>d... View full abstract»

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  • Frequency multiplication of speech signals

    Publication Year: 1969, Page(s):202 - 208
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (869 KB)

    Multiplication of the instantaneous frequency of a speech signal is studied by computer simulation. Interest centers on a simple means for compressing and expanding the time dimension of the signal, and for scaling the envelope of its short-time spectrum. Simulation of the process indicates that the speech formant dominant in intensity "captures" the multiplication. In the multiplied signal, the f... View full abstract»

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  • Roundoff noise in floating point fast Fourier transform computation

    Publication Year: 1969, Page(s):209 - 215
    Cited by:  Papers (50)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (686 KB)

    A statistical model for roundoff errors is used to predict output noise-to-signal ratio when a fast Fourier transform is computed using floating point arithmetic. The result, derived for the case of white input signal, is that the ratio of mean-squared output noise to mean-squared output signal varies essentially as\nu = \log_{2}NwhereNis the number of points transformed. Thi... View full abstract»

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  • A computer-controlled system for the subjective evaluation of speech samples

    Publication Year: 1969, Page(s):216 - 221
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (974 KB)

    A system is described which uses a Honeywell DDP-516 computer to prepare and execute subjective evaluation tests of prerecorded speech material. The system utilizes two ordinary tape reproducers for the storage and fetching of speech samples. Both tape drives are under computer control. On-line access to any desired speech sample in the repertoire makes possible the use of sequential testing strat... View full abstract»

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  • An effective bandwidth reduction for communication use in a VHF/UHF satellite link

    Publication Year: 1969, Page(s):222 - 224
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (354 KB)

    A new modulation system is described by which two voice and three additional teletype subchannels are to be interlaced within a frequency range of a usual standard phone channel. In general, economical aspects govern an effective bandwidth reduction for signal communication. This becomes extremely valid for all relatively narrow-band radio links via satellites in the VHF/ UHF range. With respect t... View full abstract»

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  • IEEE Recommended Practice for Speech Quality Measurements

    Publication Year: 1969, Page(s):225 - 246
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2337 KB)

    The IEEE Recommended Practice for Speech Quality Measurement is the product of roughly six years of study, discussion, writing, and rewriting by a diligent team of scientists representing a broad range of disciplines and research institutions. We will attempt to recognize here all those who participated, ranging from the dogged individuals who were with the committee for its entire life to those w... View full abstract»

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  • On the Zenner theory of the magnetic recording process

    Publication Year: 1969, Page(s):247 - 248
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (171 KB)

    It has occurred quite frequently, at least in the field of magnetic recording theory, that theories or models were judged by experiments conducted beyond the validity limits of the theory or model in question. Experiments conducted within the validity limits of the Zenner model show the importance of the proper selection of the parameter values used for the measurement, and in addition, justify th... View full abstract»

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  • An adjustment-free complementary power amplifier

    Publication Year: 1969, Page(s):248 - 250
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    A power amplifier circuit is presented which uses silicon n-p-n and germanium p-n-p power transistors, and which requires no bias adjustment or selection of transistors. A wide range of power output is available, the circuit is temperature stable, and distortion is very low. View full abstract»

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  • [Back cover]

    Publication Year: 1969, Page(s): c4
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    Freely Available from IEEE

Aims & Scope

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

Full Aims & Scope