{"id":9429,"date":"2020-01-09T09:58:58","date_gmt":"2020-01-09T14:58:58","guid":{"rendered":"https:\/\/blogs.sw.siemens.com\/simcenter\/?p=9429"},"modified":"2026-03-26T06:04:53","modified_gmt":"2026-03-26T10:04:53","slug":"sound-source-localization-using-microphone-array","status":"publish","type":"post","link":"https:\/\/blogs.sw.siemens.com\/simcenter\/sound-source-localization-using-microphone-array\/","title":{"rendered":"Praga racing cars: Full speed towards top interior sound quality"},"content":{"rendered":"\n<p>Have you ever found yourself watching Formula 1 race on Sunday afternoon? Trilling, isn\u2019t it. Imagine yourself driving one of these racing cars on average speed of 250 km\/h. Or perhaps , do you already have such experience? <\/p>\n\n\n\n<figure class=\"wp-block-video\"><video controls poster=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-Cars-Thumnail.jpg\" src=\"https:\/\/videos.mentor-cdn.com\/mgc\/videos\/5400\/e3ab729c-cb89-438e-8e31-85da407cd062-en-US-video.mp4\"><\/video><figcaption>Sound source localization with Simcenter Testlab 3D Acoustic Camera for Praga Cars<\/figcaption><\/figure>\n\n\n\n<p><a rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\" href=\"https:\/\/www.pragaglobal.com\/cars\/\" target=\"_blank\">Praga cars<\/a> is one of the speed cars manufacturer in this game. Their full-carbon model called R1, developed in 2013, is the company\u2019s chart topper. These cars excel in two extremes \u2013 the lightweight construction (592 kg) and the &nbsp;powerful engine with 210 bhp, designed for extreme operational speed. Consequently, these extremes deteriorate the NVH performance from the acoustic point of view. Obviously, racing cars are so loud (also) inside, so that wearing a helmet has an additional reason. It protects driver\u2019s hearing. &nbsp;In term of continuous product development, Praga cars decided to investigate how to improve the acoustics of the vehicle cabin. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-interior-1024x576.jpg\" alt=\"Praga cars is aiming to improve the interior sound quality of the racing cars and increase driver's comfort\" class=\"wp-image-9435\" srcset=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-interior-1024x576.jpg 1024w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-interior-600x338.jpg 600w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-interior-768x432.jpg 768w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-interior-1536x864.jpg 1536w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-interior-1110x624.jpg 1110w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-interior.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Praga Cars: Improving interior sound quality<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Sound source localization using microphone array: smart and easy<\/h2>\n\n\n\n<p>In this case, the Siemens team decided to use the <a>Simcenter Testlab 3D Acoustic Camera<\/a> solution. This setup is capable not only to localize the sound sources, but also to visualize the sound power contributions. As such, it provides more insights into the noise structures. This solution is a bundle of a 3D Photo Geometry Scanner, Simcenter Solid Sphere Array counting 54 microphones, <a rel=\"noreferrer noopener\" aria-label=\" (opens in a new tab)\" href=\"https:\/\/www.plm.automation.siemens.com\/global\/en\/products\/simcenter\/scadas.html\" target=\"_blank\">Simcenter SCADAS data acquisition system<\/a> (that can be controlled with a tablet app), and Simcenter Testlab 3D Acoustic Camera software. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-Simcenter-3D-Acoustic-Camera-1024x576.jpg\" alt=\"Acquiring acoustic data inside the cabin using sound source localization techniques with a microphone array\" class=\"wp-image-9436\" srcset=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-Simcenter-3D-Acoustic-Camera-1024x576.jpg 1024w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-Simcenter-3D-Acoustic-Camera-600x338.jpg 600w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-Simcenter-3D-Acoustic-Camera-768x432.jpg 768w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-Simcenter-3D-Acoustic-Camera-1536x864.jpg 1536w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-Simcenter-3D-Acoustic-Camera-1110x624.jpg 1110w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Praga-Simcenter-3D-Acoustic-Camera.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Sound source localization using microphone array in the cabin &#8211; data acquisition<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-installation-1024x512.jpg\" alt=\"\" class=\"wp-image-9701\" srcset=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-installation-1024x512.jpg 1024w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-installation-600x300.jpg 600w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-installation-768x384.jpg 768w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-installation-1110x555.jpg 1110w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-installation.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Simcenter 3D Acoustic Camera &#8211; installation<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Investigating the noise leaks step by step <\/h2>\n\n\n\n<p>At the first step, the Siemens team installed a frame\nholding the scanner into the cabin. Once the interior was completely mapped in\n3D, the scanner was replaced with the microphone array.<\/p>\n\n\n\n<p>At the second step, the team proceeded with the acoustic\nmeasurements. On the chassis dyno, the vehicle ran on different engine rotation\nspeeds, while the camera\u2019s microphones registered the changes of sound pressure\nin the cabin. As the outcome, the team obtains a clear visualization of the\nso-called \u2018hot spots.\u2019 This visualization accurately displays the acoustic\nleaks of different exterior sound sources, such as the wheels, chassis, and aero-acoustic\nnoise. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-test-1024x576.jpg\" alt=\"\" class=\"wp-image-9437\" srcset=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-test-1024x576.jpg 1024w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-test-600x338.jpg 600w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-test-768x432.jpg 768w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-test-1536x864.jpg 1536w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-test-1110x624.jpg 1110w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-test.jpg 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Sound source localization measurements: controlling measurements and accessing data on a tablet<\/figcaption><\/figure>\n\n\n\n<p>Finally, with this data, the team was able to generate a detailed report. The goal of these measurements is to turn the acquired data into valuable insights for further vehicle improvement. Using the power of this technique, also known as <a href=\"https:\/\/www.plm.automation.siemens.com\/global\/en\/products\/simulation-test\/sound-source-localization-systems.html\" target=\"_blank\" rel=\"noopener\">sound source localization<\/a>, identifies the points of attention straight away. As a result, instead of taking the \u2018trial-and-error\u2019 approach, the development teams are now able to tackle acoustic issues strategically. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"504\" src=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/3Dcam_ArrayAnalysisViewer_4displays-1024x504.png\" alt=\"Simcenter Testlab 3D Acoustic Camera -  acoustic heat map\" class=\"wp-image-9438\" srcset=\"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/3Dcam_ArrayAnalysisViewer_4displays-1024x504.png 1024w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/3Dcam_ArrayAnalysisViewer_4displays-600x295.png 600w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/3Dcam_ArrayAnalysisViewer_4displays-768x378.png 768w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/3Dcam_ArrayAnalysisViewer_4displays-1536x756.png 1536w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/3Dcam_ArrayAnalysisViewer_4displays-1110x546.png 1110w, https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/3Dcam_ArrayAnalysisViewer_4displays.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Outcome of the measurements: A heat map showing low- to mid-frequency noise sources <\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Getting smart with sound source localization<\/h2>\n\n\n\n<p>To sum up, sound source localization techniques have several big advantages: they don\u2019t require extensive time investment, counter measures can be evaluated immediately, and more advanced tools are available for further post-processing. <\/p>\n\n\n\n<p>Are you interested to learn more about sound source localization  sing using microphone array technique? <\/p>\n\n\n\n<p><strong>Sign up for this free webinar &#8211; <a href=\"https:\/\/www.plm.automation.siemens.com\/global\/en\/webinar\/sound-source-localization\/56963\" target=\"_blank\" rel=\"noopener\">Fundamentals of sound source localization<\/a> and turn this knowledge into your smart engineering practice. <\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Have you ever found yourself watching Formula 1 race on Sunday afternoon? Trilling, isn\u2019t it. Imagine yourself driving one of&#8230;<\/p>\n","protected":false},"author":12361,"featured_media":9437,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spanish_translation":"","french_translation":"","german_translation":"","italian_translation":"","polish_translation":"","japanese_translation":"","chinese_translation":"","footnotes":""},"categories":[174,1,183],"tags":[],"industry":[89,132],"product":[518],"coauthors":[],"class_list":["post-9429","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-customer-success-story","category-news","category-video","industry-automotive-transportation","industry-automotive-oems","product-simcenter-testing-solutions"],"featured_image_url":"https:\/\/blogs.sw.siemens.com\/wp-content\/uploads\/sites\/6\/2020\/01\/Simcenter-3D-Acoustic-Camera-test.jpg","_links":{"self":[{"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/posts\/9429","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/users\/12361"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/comments?post=9429"}],"version-history":[{"count":4,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/posts\/9429\/revisions"}],"predecessor-version":[{"id":9707,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/posts\/9429\/revisions\/9707"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/media\/9437"}],"wp:attachment":[{"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/media?parent=9429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/categories?post=9429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/tags?post=9429"},{"taxonomy":"industry","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/industry?post=9429"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/product?post=9429"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/blogs.sw.siemens.com\/simcenter\/wp-json\/wp\/v2\/coauthors?post=9429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}