A hybrid MLS technique for room impulse response estimation

Paulo, Joel; Martins, C.R.; Coelho, José

doi:10.1016/j.apacoust.2008.07.007

Cited by 14 publications

(4 citation statements)

References 8 publications

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“…The convolution under the assumption u(t − N) = u(t) is called circular convolution. The circular convolution can ignore some difficulties such as leakage, and is often employed in acoustic engineering (e.g., [18]). In the rest of this letter, we assume u(t − N) = u(t) and consider (11).…”

Section: Problem Settingmentioning

confidence: 99%

Kernel Regularization in Frequency Domain: Encoding High-Frequency Decay Property

Fujimoto

2020

IEEE Control Syst. Lett.

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This letter discusses the kernel regularization in the frequency domain. In particular, this letter proposes a new kernel which encodes prior knowledge on the rate of high frequency decay. The proposed kernel has a similar structure to the one of the first order spline kernel. By exploiting the known properties of such kernel, the determinant and the inverse of the Gram matrix of the proposed kernel are given in closed form. One of the important advantages of the proposed kernel is the computational burden reduction. In fact, it turns out that the complexity is linear in the dataset size N, while standard methods require O(n 2) memory and O(n 3) flops, where n is the impulse response length usually satisfying N n 2 in regularization frameworks.

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Section: Problem Settingmentioning

confidence: 99%

Kernel Regularization in Frequency Domain: Encoding High-Frequency Decay Property

Fujimoto

2020

IEEE Control Syst. Lett.

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“…One of its main and important advantages is a high signal-to-noise ratio (SNR) and its robustness against impulsive or non-stationary disturbances [6]. On the other hand, contrary to swept-sine signals [7,8], the MLS technique can not properly deal with nonlinear or time-variant systems and exhibits negative effects such as distortion artifacts and increased noise [5,9,10,11,12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Impulse Response Measurements using MLS Technique on Nonsynchronous Devices

Novák¹,

Rund²,

Honzík³

2016

J. Audio Eng. Soc.

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Maximum-length sequences (MLS) are widely used for measurement of impulse responses of linear time-invariant systems in acoustic and audio systems. It is usually believed that one of the drawbacks of the MLS technique is a requirement on a synchronization of the devices used for the generation and acquisition of the MLS signals. The study presented in this paper shows that the MLS technique can easily be improved and applied to devices that are not synchronous, or even operating at different sampling frequencies. To show the efficiency of the proposed modification to MLS technique we provide several experiments such as a measurement with devices working at 44.1 kHz on the generation side and 96 kHz on the acquisition side, or a measurement of the frequency response function of a cheap mobile phone in which the synchronous clocking would be impossible to realize.The archived file is not the final published version of the article A.

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“…Measurement of a room IR can be carried out applying various excitation signals [4][5][6][7]. One of the most widely used signals is maximum length sequence (MLS) [5,[8][9][10][11]. Depending on the applied signal (method), during an IR measurement some requirements have to be fulfilled, including linearity and time-invariance.…”

Section: Introductionmentioning

confidence: 99%

Separability of Distortion Products in Room Impulse Response Measurements with Maximum Length Sequences

Ćirić

Pantić²

2012

Building Acoustics

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In the room impulse response measurements, one of the common disturbances affecting the measured results is nonlinearity. When maximum length sequences are applied for the measurements, the distortion products are distributed along the estimated impulse response. While this property of maximum length sequences has been widely used in the auditory system applications for characterization of a nonlinear system, it has not been exploited in room acoustics. Due to this reason, the possibility of separating the distortion products in the measurements of the room impulse responses with maximum length sequences is analyzed in this paper. The results show that this measurement method is sensitive to nonlinearities, but the separability of the distortion products could reduce the nonlinearity effects.

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A hybrid MLS technique for room impulse response estimation

Cited by 14 publications

References 8 publications

Kernel Regularization in Frequency Domain: Encoding High-Frequency Decay Property

Kernel Regularization in Frequency Domain: Encoding High-Frequency Decay Property

Impulse Response Measurements using MLS Technique on Nonsynchronous Devices

Separability of Distortion Products in Room Impulse Response Measurements with Maximum Length Sequences

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