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Simultaneous Measurement of Impulse Response and Distortion with a Swept-Sine Technique

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TLDR
A novel measurement technique of the transfer function of weakly not-linear, approximately time-invariant systems is presented, based on an exponentially-swept sine signal, applicable to loudspeakers and other audio components, but also to room acoustics measurements.
Abstract
A novel measurement technique of the transfer function of weakly not-linear, approximately time-invariant systems is presented. The method is implemented with low-cost instrumentation; it is based on an exponentially-swept sine signal. It is applicable to loudspeakers and other audio components, but also to room acoustics measurements. The paper presents theoretical description of the method and experimental verification in comparison with MLS.

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Citations
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Journal ArticleDOI

Loudspeaker Analysis: A Radar Based Approach

TL;DR: The novel use of radar micro-Doppler for loudspeaker analysis offers the potential benefits of characterizing the mechanical motion of a loudspeaker in order to identify defects and design issues.
Patent

Updating modeling information based on online data gathering

TL;DR: In this paper, a processor is configured to provide a live output signal for transmission from a speaker, receive an input signal corresponding to the output signal, compute a midrange sensitivity and a lowpass sensitivity for a transfer function derived from a spectrum of the input signal and a spectrum spectrum of output signal; subtract the midrange sensitivity from the low-pass sensitivity to obtain a speaker-related sensitivity.
Patent

Vibrational devices as sound sensors

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BRIR Synthesis Using First-Order Microphone Arrays

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Measurement of Head Related Impulse Responses for psychoacoustic research

TL;DR: The importance of Head Related Impulse Responses for psychoacoustic experiments and especially for studies in directional hearing has been growing, mainly caused by the availability of fast computers and the resulting possibility of very realistic dynamic binaural synthesis.
References
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Journal Article

Aspects of MLS Measuring Systems

TL;DR: In this paper, the pathology of maximum length sequence (MLS) systems when there is distortion of various kinds is explored, and the properties of such a system are discussed in detail.
Journal Article

The stereo dipole : A virtual source imaging system using two closely spaced loudspeakers

TL;DR: In this article, a system comprising only two closely spaced loudspeakers can create very convincing virtual images around a single listener, and it is demonstrated that such a system is very robust with respect to head movement, and that the processing does not introduce any excessive artifacts.
Journal ArticleDOI

Acoustic measurements in opera houses: comparison between different techniques and equipment

TL;DR: The aim of this work is to define a tightly standardized measurement procedure for the collection of a complete objective description of an opera house's acoustics, and some of the results obtained after measurements made in three different halls are presented.
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Software Implementation of an MLS Analyzer with Tools for Convolution, Auralization and Inverse Filtering

TL;DR: The paper describes a suite of software tools, which have been developed as extensions to the most diffused shareware program for waveform editing on Win-32 PCs (Cool Edit 96 by David Johnston).