A Feasibility Study for a Hand-Held Acoustic Imaging Camera
Acoustic imaging systems construct spatial maps of sound sources and have potential in various applications, but large, cumbersome form factors limit their adoption. This paper investigates methodologies to miniaturize acoustic camera systems for improved mobility. Our approach optimizes planar micr...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/13/19/11110 |
| _version_ | 1797576106400808960 |
|---|---|
| author | Danilo Greco |
| author_facet | Danilo Greco |
| author_sort | Danilo Greco |
| collection | DOAJ |
| description | Acoustic imaging systems construct spatial maps of sound sources and have potential in various applications, but large, cumbersome form factors limit their adoption. This paper investigates methodologies to miniaturize acoustic camera systems for improved mobility. Our approach optimizes planar microphone array design to achieve directional sensing capabilities on significantly reduced footprints compared to benchmarks. The current prototype utilizes a 128−microphone, 50 × 50 cm<sup>2</sup> array with beamforming algorithms to visualize acoustic fields in real time but its stationary bulk hampers portability. We propose minimizing the physical aperture by carefully selecting microphone positions and quantities with tailored spatial filter synthesis. This irregular array geometry concentrates sensitivity toward target directions while avoiding aliasing artefacts. Simulations demonstrate a 32−element, ≈20 × 20 cm<sup>2</sup> array optimized this way can outperform the previous array in directivity and noise suppression in a sub-range of frequencies below 4 kHz, supporting a 4× surface factor reduction with acceptable trade-offs. Ongoing work involves building and testing miniature arrays to validate performance predictions and address hardware challenges. The improved mobility of compact acoustic cameras could expand applications in car monitoring, urban noise mapping and other industrial fields limited by current large systems. |
| first_indexed | 2024-03-10T21:48:39Z |
| format | Article |
| id | doaj.art-745bc5b371a942a68be3cc4f81d861d2 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T21:48:39Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-745bc5b371a942a68be3cc4f81d861d22023-11-19T14:08:49ZengMDPI AGApplied Sciences2076-34172023-10-0113191111010.3390/app131911110A Feasibility Study for a Hand-Held Acoustic Imaging CameraDanilo Greco0DiSEGIM—Department of Economics, Law, Cybersecurity, and Sports Sciences, Università Degli Studi di Napoli Parthenope, Via Guglielmo Pepe, 80035 Nola, ItalyAcoustic imaging systems construct spatial maps of sound sources and have potential in various applications, but large, cumbersome form factors limit their adoption. This paper investigates methodologies to miniaturize acoustic camera systems for improved mobility. Our approach optimizes planar microphone array design to achieve directional sensing capabilities on significantly reduced footprints compared to benchmarks. The current prototype utilizes a 128−microphone, 50 × 50 cm<sup>2</sup> array with beamforming algorithms to visualize acoustic fields in real time but its stationary bulk hampers portability. We propose minimizing the physical aperture by carefully selecting microphone positions and quantities with tailored spatial filter synthesis. This irregular array geometry concentrates sensitivity toward target directions while avoiding aliasing artefacts. Simulations demonstrate a 32−element, ≈20 × 20 cm<sup>2</sup> array optimized this way can outperform the previous array in directivity and noise suppression in a sub-range of frequencies below 4 kHz, supporting a 4× surface factor reduction with acceptable trade-offs. Ongoing work involves building and testing miniature arrays to validate performance predictions and address hardware challenges. The improved mobility of compact acoustic cameras could expand applications in car monitoring, urban noise mapping and other industrial fields limited by current large systems.https://www.mdpi.com/2076-3417/13/19/11110acoustic imagingmicrophone arraysrobust super directive beamformingarray processingminiaturizationaperiodic sparse planar arrays |
| spellingShingle | Danilo Greco A Feasibility Study for a Hand-Held Acoustic Imaging Camera Applied Sciences acoustic imaging microphone arrays robust super directive beamforming array processing miniaturization aperiodic sparse planar arrays |
| title | A Feasibility Study for a Hand-Held Acoustic Imaging Camera |
| title_full | A Feasibility Study for a Hand-Held Acoustic Imaging Camera |
| title_fullStr | A Feasibility Study for a Hand-Held Acoustic Imaging Camera |
| title_full_unstemmed | A Feasibility Study for a Hand-Held Acoustic Imaging Camera |
| title_short | A Feasibility Study for a Hand-Held Acoustic Imaging Camera |
| title_sort | feasibility study for a hand held acoustic imaging camera |
| topic | acoustic imaging microphone arrays robust super directive beamforming array processing miniaturization aperiodic sparse planar arrays |
| url | https://www.mdpi.com/2076-3417/13/19/11110 |
| work_keys_str_mv | AT danilogreco afeasibilitystudyforahandheldacousticimagingcamera AT danilogreco feasibilitystudyforahandheldacousticimagingcamera |