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IEEE Transactions on Audio and Electroacoustics

Issue 4 • Date December 1968

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Displaying Results 1 - 13 of 13
  • [Front cover and table of contents]

    Publication Year: 1968, Page(s): 0
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  • Comments on "spectral analysis of the calls of the male Killer Whale"

    Publication Year: 1968, Page(s): 523
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  • The ac resistance of carbon microphones

    Publication Year: 1968, Page(s):525 - 527
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  • Abstracts of current literature on audio and electroacoustics

    Publication Year: 1968, Page(s):529 - 546
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  • Spectral considerations on the tone burst method for measuring transient distortion in loudspeakers

    Publication Year: 1968, Page(s):515 - 519
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    Spectral considerations on the conventional method for measuring the transient distortion in loudspeakers (repeated tone burst method) show that the result of the measurement is proportional to a weighted sum of the values of the complex transfer characteristic of the loudspeaker at the discrete frequencies f0and (2m-1) f0/2n where f0is the frequency of the pure to... View full abstract»

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  • The use of waveform asymmetry to identify voiced sounds

    Publication Year: 1968, Page(s):500 - 506
    Cited by:  Papers (2)  |  Patents (2)
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    A simple speech measurement is described that allows the identification of voiced and unvoiced sounds. In addition the measurement can be used to distinguish between a limited number of different vowel sounds. The measurement consists of examining the difference in magnitude between the positive and negative peaks of the speech waveform. This asymmetry measurement can become completely volume inse... View full abstract»

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  • On numerical evaluation of power density spectra of random functions

    Publication Year: 1968, Page(s):527 - 528
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    This correspondence explains the reason for obtaining negative estimates for power density spectra in numerical calculations. The major source of error is not what is ordinarily believed a precision problem [1] in the computer program. The main error lies in using the usual Fourier cosine transform definition which is no longer valid for numerical work. A more appropriate definition is suggested. View full abstract»

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  • Sound synthesis: A flexible modular approach with integrated circuits

    Publication Year: 1968, Page(s):507 - 514
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    Recent interest in environmental art has generated a need for sophisticated but inexpensive sound synthesis and lighting control systems which can be manipulated by artists unfamiliar with electronics. A system philosophy that meets these requirements is described. Maximum flexibility through voltage control of audio variables by separate functional modules and input-output voltage compatibility a... View full abstract»

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  • Analysis of a feedback-controlled limiter using a logarithmic measuring scale

    Publication Year: 1968, Page(s):481 - 485
    Cited by:  Papers (2)
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    Feedback-controlled variable-gain limiting and compression systems are used to limit the maximum signal or dynamic range of a signal. By using a logarithmic weighting scale in analyzing such a device, we found that the attack time and overshoot of the gain reduction are directly dependent on the delay of the gain-control feedback loop. With the optimum loop gain, the attack time is approximately f... View full abstract»

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  • Long-wavelength response of magnetic reproducing heads

    Publication Year: 1968, Page(s):486 - 494
    Cited by:  Papers (4)  |  Patents (1)
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    The distribution of the long-wavelength magnetic flux in unshielded and shielded magnetic head cores is described and calculated. Two effects are found, depending on the path of the flux: the "secondary gap effect" and the "undulation effect." The secondary gap effect causes an increasing output level at long wavelengths; it occurs because of the finite permeability of the core. The undulation eff... View full abstract»

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  • Adaptive spectral analysis for speech-sound recognition

    Publication Year: 1968, Page(s):523 - 525
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    A pattern recognition algorithm has been used to compare the usefulness of two types of spectrum analyzers for speech recognition. View full abstract»

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  • Discrete Fourier transforms, linear filters, and spectrum weighting

    Publication Year: 1968, Page(s):495 - 499
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Computational procedures which have been developed in the past few years have taken the familiar frequency-domain techniques from the realm of theory and placed them in the realm of practice. In order to realize fully the potential of th techniques, it is necessary to gain insight into the physical significance of the discrete Fourier transform. Here, the discrete Fourier transform is viewed as a ... View full abstract»

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  • Loudness and annoyance of impulsive office noise

    Publication Year: 1968, Page(s):520 - 522
    Cited by:  Papers (1)
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    A study has been made on the evaluation of natural impulsive noises by subjective and objective procedures. One special example was used to get an indication of whether existing objective calculation methods might give sufficient agreement with subjective tests. The office noise sample studied bursts from a single typewriter operated at repetition rates between 1.5 and 15 strokes per second. A for... 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