Impulse response measurement using Golay codes

Foster, Scott

doi:10.1109/icassp.1986.1168980

Cited by 39 publications

(20 citation statements)

References 2 publications

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“…Once the impulse response is obtained simple mathematical operations are used to obtain the frequency response or group delay of the filter under test. More information on Golay codes and their use in determining impulse response is given by Foster (1986).…”

Section: Methodsmentioning

confidence: 99%

Directional hearing in a silicon cricket

et al. 2007

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Section: Methodsmentioning

confidence: 99%

Directional hearing in a silicon cricket

et al. 2007

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“…Figure 2) using the Golay codes process [16]. As we are in a robot audition context, we model the future robot by a child size dummy (1m20) for the sound acquisition process, with 16 sensors fixed in its head (cf.…”

Section: Hrtf Databasementioning

confidence: 99%

“…The Golay complementary sequences have the useful property that their autocorrelation functions have complementary sidelobes: the sum of the autocorrelation sequences is exactly zero everywhere except at the origin. Using this property and the recorded complementary Golay codes, the HRTF are calculated as in [16].…”

Section: Hrtf Databasementioning

confidence: 99%

Blind source separation for robot audition using fixed HRTF beamforming

Maazaoui

Abed-Meraim

Grenier

2012

EURASIP J. Adv. Signal Process.

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In this article, we present a two-stage blind source separation (BSS) algorithm for robot audition. The first stage consists in a fixed beamforming preprocessing to reduce the reverberation and the environmental noise. Since we are in a robot audition context, the manifold of the sensor array in this case is hard to model due to the presence of the head of the robot, so we use pre-measured head related transfer functions (HRTFs) to estimate the beamforming filters. The use of the HRTF to estimate the beamformers allows to capture the effect of the head on the manifold of the microphone array. The second stage is a BSS algorithm based on a sparsity criterion which is the minimization of the l 1 norm of the sources. We present different configuration of our algorithm and we show that it has promising results and that the fixed beamforming preprocessing improves the separation results.

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“…However, longer FIR filters result in superior equalization. Figure 14 The time delays were estimated from the speaker Impulse Responses (IRs) obtained using Golay codes [4]. Figure 14 shows the uncompensated (top) and compensated (bottom) time delays for each speaker in the EER.…”

Section: A Speaker Equalization Filtersmentioning

confidence: 99%

Acoustic calibration of the exterior effects room at the NASA Langley Research Center.

Faller

Rizzi

Klos

et al. 2010

The Journal of the Acoustical Society of America

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Abstract. The Exterior Effects Room (EER) at the NASA Langley ResearchCenter is a 39-seat auditorium built for psychoacoustic studies of aircraft community noise. The original reproduction system employed monaural playback and hence lacked sound localization capability. In an effort to more closely recreate field test conditions, a significant upgrade was undertaken to allow simulation of a three-dimensional audio and visual environment. The 3D audio system consists of 27 mid and high frequency satellite speakers and 4 subwoofers, driven by a real-time audio server running an implementation of Vector Base Amplitude Panning. The audio server is part of a larger simulation system, which controls the audio and visual presentation of recorded and synthesized aircraft flyovers. The focus of this work is on the calibration of the 3D audio system, including gains used in the amplitude panning algorithm, speaker equalization, and absolute gain control. Because the speakers are installed in an irregularly shaped room, the speaker equalization includes time delay and gain compensation due to different mounting distances from the focal point, filtering for color compensation due to different installations (half space, corner, baffled/unbaffled), and cross-over filtering. PACS: 43.55.Jzhttps://ntrs.nasa.gov/search.jsp?R=20100027436 2018-05-09T20:09:23+00:00Z

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Impulse response measurement using Golay codes

Cited by 39 publications

References 2 publications

Directional hearing in a silicon cricket

Directional hearing in a silicon cricket

Blind source separation for robot audition using fixed HRTF beamforming

Acoustic calibration of the exterior effects room at the NASA Langley Research Center.

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