Characterization of MEMS microphone sensitivity and phase distributions with applications in array processing

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)

Samenvatting

An array with MEMS microphones can distinguish individual noise sources in an environment through spatial filtering. Its effectiveness depends on the variations in microphone sensitivity and phase. Quantification of these variations is valuable, because it enables assessment and optimization of array performance. This is particularly important if the measurements are to be used for enforcement of noise regulations.

Nominal microphone sensitivity and phase are manufacturer-specified, but the distribution (histogram) around these values is not. Hence, this work demonstrates a free-field comparison method for measuring these variations in a batch of arrays. We also provide the histograms at 1 kHz for a sample population of 8384 Knowles SPH0641LM4H-1 MEMS microphones (131 arrays of 64 microphones). The histograms follow t-distributions, resulting in 95% confidence intervals of ±0.39dB for sensitivity and ±0.82◦ for phase. Finally, we illustrate that delay-and-sum beamforming with these microphones results in a Gumbel-distributed gain with −0.13/+0.10dB 95% confidence interval.
Originele taal-2Engels
Titel2021 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2021 - Proceedings
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's4480-4484
Aantal pagina's5
ISBN van elektronische versie9781728176055
DOI's
StatusGepubliceerd - 6 jun. 2021
Evenement2021 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2021 - Virtual, Toronto, Canada
Duur: 6 jun. 202111 jun. 2021
https://2021.ieeeicassp.org/

Publicatie series

NaamICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
ISSN van geprinte versie1520-6149

Congres

Congres2021 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2021
Verkorte titelICASSP 2021
Land/RegioCanada
StadToronto
Periode6/06/2111/06/21
Internet adres

Vingerafdruk

Duik in de onderzoeksthema's van 'Characterization of MEMS microphone sensitivity and phase distributions with applications in array processing'. Samen vormen ze een unieke vingerafdruk.

Citeer dit