Impulse response measurement with sine sweeps and amplitude modulation schemes

Meng, Qingqing; Sen, D.; Wang, Sisi; Hayes, Lauren

doi:10.1109/icspcs.2008.4813749

Cited by 21 publications

(7 citation statements)

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“…Nevertheless, unlike the linear sine sweep, the ESS sweeps faster over high frequencies than low frequencies, leading to a pink spectrum. Consequently, the non-uniform temporal distribution of excitation energy makes the signal spectrum not-flat [49]. This problem was resolved by Farina [39] upon the amplitude modulation of the time reversed signal.…”

Section: Discussionmentioning

confidence: 99%

“…This problem was resolved by Farina [39] upon the amplitude modulation of the time reversed signal. As an alternative, Meng et al [49] implemented a pre-modulation to the input swept-sine signal to make the spectrum flat. Some other practical problems with the sweep signal synthesis in the time domain have also been resolved by its construction in the frequency domain [47].…”

Section: Discussionmentioning

confidence: 99%

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A Vibrational Technique for In Vitro Intraoperative Prosthesis Fixation Monitoring

Yousefsani

Dejnabadi

Guyen³

et al. 2020

IEEE Trans. Biomed. Eng.

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In this paper, a new vibrational modal analysis technique was developed for intraoperative cementless prosthesis fixation evaluation upon hammering. Methods: An artificial bone (Sawbones)-prosthesis system was excited by sweeping of a sine signal over a wide frequency range. The exponential sine sweep technique was implemented to the response signal in order to determine the linear impulse response. Recursive Fourier transform enhancement (RFTE) technique was applied to the linear impulse response signal in order to enhance the frequency spectrum with sharp and distinguishable peak values indicating distinct high natural frequencies of the system (ranging from 15 kHz to 90 kHz). The experiment was repeated with 5 Sawbones-prosthesis samples. Upon successive hammering during the prosthesis insertion, variation of each natural frequency was traced. Results: Compared to classical Fast Fourier Transform, RFTE provided a better tracing and enhancement of frequency components during insertion. Three different types of frequency evolving trends (monotonically increasing, insensitive, and plateau-like) were observed for all samples, as confirmed by a new finite element simulation of the prosthesis dynamic insertion. Two main mechanical phenomena (i.e., geometrical compaction and compressive stress) were shown to govern these trends in opposite ways. Followup of the plateau-like trend upon hammering showed that the frequency shift is a good indicator of fixation. Conclusion: Alongside the individual follow-up of frequency shifts, combinatorial frequency analysis provides new objective information on the mechanical stability of Sawboneprosthesis fixation. Significance: The proposed vibrational technique based on RTFE can provide the surgeon with a new assistive diagnostic technique during the surgery by indicating when the bone-prosthesis fixation is acceptable, and beyond of which further hammering should be done cautiously to avoid bone fracture.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A Vibrational Technique for In Vitro Intraoperative Prosthesis Fixation Monitoring

Yousefsani

Dejnabadi

Guyen³

et al. 2020

IEEE Trans. Biomed. Eng.

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“…Thus, the calibration procedure is as follows: 1. Frequency response: For the range of frequencies from 50 Hz to 12 kHz, a sine-swept signal is applied to the array of GNSs to compute the frequency response [36].…”

Section: Laboratory Testsmentioning

confidence: 99%

A low-cost noise measurement device for noise mapping based on mobile sampling

2019

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“…Both parameters are used to adjust the preprocessing speech signal to obtain the best speech intelligibility. Furthermore, based on the method by Meng et al [23], a sine sweep signal with a length of 10 s is used as an excitation signal to obtain the RIR in advance to calculate the inverse filter.…”

Section: Proposed Speech Intelligibility Improvement Algorithmmentioning

confidence: 99%

Speech intelligibility improvement in noisy reverberant environments based on speech enhancement and inverse filtering

Dong

Lee

2018

J AUDIO SPEECH MUSIC PROC.

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The speech intelligibility of indoor public address systems is degraded by reverberation and background noise. This paper proposes a preprocessing method that combines speech enhancement and inverse filtering to improve the speech intelligibility in such environments. An energy redistribution speech enhancement method was modified for use in reverberation conditions, and an auditory-model-based fast inverse filter was designed to achieve better dereverberation performance. An experiment was performed in various noisy, reverberant environments, and the test results verified the stability and effectiveness of the proposed method. In addition, a listening test was carried out to compare the performance of different algorithms subjectively. The objective and subjective evaluation results reveal that the speech intelligibility is significantly improved by the proposed method.

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Impulse response measurement with sine sweeps and amplitude modulation schemes

Cited by 21 publications

References 0 publications

A Vibrational Technique for In Vitro Intraoperative Prosthesis Fixation Monitoring

A Vibrational Technique for In Vitro Intraoperative Prosthesis Fixation Monitoring

A low-cost noise measurement device for noise mapping based on mobile sampling

Speech intelligibility improvement in noisy reverberant environments based on speech enhancement and inverse filtering

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