{"id":14840,"date":"2025-11-20T09:36:04","date_gmt":"2025-11-20T08:36:04","guid":{"rendered":"https:\/\/www.vrtonung.de\/?p=14840"},"modified":"2026-08-10T15:03:02","modified_gmt":"2026-08-10T13:03:02","slug":"localise-sound-modern-methods-and-technologies-for-precise-sound-source-localisation","status":"publish","type":"post","link":"https:\/\/www.vrtonung.de\/en\/localise-sound-modern-methods-and-technologies-for-precise-sound-source-localisation\/","title":{"rendered":"Localise sound: Modern methods and technologies for precise sound source localisation"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_opengraph-image":"https:\/\/www.vrtonung.de\/wp-content\/uploads\/og-geraeusche-lokalisieren-moderne-methoden-und-technologien-fuer-die-praezise-schallquellenortung_1200x630-aimg.jpg","_yoast_wpseo_opengraph-image-id":"","_yoast_wpseo_twitter-image":"https:\/\/www.vrtonung.de\/wp-content\/uploads\/og-geraeusche-lokalisieren-moderne-methoden-und-technologien-fuer-die-praezise-schallquellenortung_1200x630.jpg","_yoast_wpseo_twitter-image-id":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-14840","post","type-post","status-publish","format-standard","hentry","category-unkategorisiert"],"acf":{"remove_from_blog_overview":true,"alternative_title":"","previewimg":18060,"text":"##Key insights\r\n\r\nAcoustic cameras enable precise localisation of noise sources in real time by combining video technology with microphone arrays.\r\n\r\nBeamforming methods visualise sound sources in colour and make noise analysis easier even for inexperienced users.\r\n\r\nModern sound cameras can detect problems up to ten times faster than conventional methods.\r\n\r\nAreas of application range from industry and the automotive sector to building diagnostics.\r\n\r\nA systematic approach with switching off interference sources and proper documentation leads to better localisation results.\r\n\r\n##What is noise localisation and why is it important?\r\n\r\nThe precise determination of the spatial position of sound sources has become an indispensable tool in modern industry.\r\nWhen a production plant makes unusual noises or a compressed air system wastes energy due to leaks, every minute spent searching for the source costs real money.\r\n\r\n[image id=\"14833\"]\r\n\r\nLocalising noises means far more than just finding noise sources.\r\nIt is a systematic approach to fault diagnosis that enables significant cost savings in various fields.\r\nIn quality control, sound source localisation helps to detect production faults at an early stage before they lead to expensive complaints.\r\n\r\nThe importance for maintenance and servicing is particularly noteworthy: by detecting signs of wear or defects at an early stage, unplanned downtime can be avoided.\r\nA defective bearing in a production machine often announces itself through characteristic noises long before a complete failure threatens.\r\n\r\n##Modern technologies for noise localisation\r\n###Acoustic cameras and beamforming\r\n\r\nThe revolution in sound analysis came with the development of acoustic cameras, which enable a completely new approach to locating noise sources.\r\nThese devices combine a conventional video camera with a precisely calibrated microphone array consisting of several dozen individual sensors.\r\n\r\nThe heart of this technology is the beamforming process.\r\nAll microphone signals are mathematically processed in such a way that the direction and intensity of sound waves can be determined precisely.\r\nThe result is displayed as a coloured overlay on the video image \u2013 red areas indicate loud sources, blue areas quiet ones.\r\n\r\n[image id=\"14837\"]\r\n\r\nModern systems work in real time and can capture both audible frequencies and ultrasound.\r\nThe resolution is impressive: under optimal conditions, sound sources can be localised to within a few centimetres.\r\nRecording is done as video with synchronised audio, enabling detailed analysis and documentation.\r\n\r\n###Different measurement techniques\r\n\r\nThe choice of the right measurement technique depends heavily on the field of application.\r\nNear-field measurements are ideal for detailed analysis of individual components or machines, while far-field measurements can cover large areas.\r\n\r\nHolography methods are used for particularly complex sound fields, for example when several sources are active at the same time and influence each other.\r\nThese methods require more elaborate data processing but provide three-dimensional information about sound propagation.\r\n\r\nIntensity measurements supplement pure localisation with quantitative data on sound power.\r\nThey not only determine where a source is located, but also how much energy it emits.\r\nThis information is particularly relevant for noise control measures and the assessment of limit values.\r\n\r\n###Main application areas of noise localisation\r\n##Industrial applications\r\n\r\nIn production environments, the practical benefits of noise localisation are particularly clear.\r\nCompressed air leaks in extensive piping systems can cause enormous energy losses.\r\nA sound camera can identify such leaks within minutes, while conventional searches with ultrasound detectors can take hours.\r\n\r\n[image id=\"14835\"]\r\n\r\nPartial discharges in high-voltage systems pose a significant safety risk.\r\nThese electrical disturbances generate characteristic ultrasound signals that can be detected with special cameras even from a safe distance.\r\nEarly detection can prevent power outages and costly repairs.\r\n\r\nIn machine diagnostics, the combination of visual and acoustic analysis enables precise assignment of noises to their causes.\r\nWear parts, imbalance or assembly errors can thus be identified in a targeted manner.\r\nThe measurement data provide a solid basis for planning maintenance activities.\r\n\r\n###Automotive industry\r\n\r\nThe automotive industry uses sound source localisation intensively to improve driving comfort.\r\nBSR noises \u2013 these are buzz, squeak and rattle noises \u2013 can significantly impair comfort.\r\nWith acoustic cameras, these disturbing sounds in vehicle interiors can be localised precisely.\r\n\r\nNVH analyses (Noise, Vibration, Harshness) are another important field of application.\r\nBoth stationary vehicles and drive-by measurements are analysed.\r\nModern test facilities can use several microphone arrays and different sensors at the same time to create a comprehensive picture of the acoustic properties.\r\n\r\nQuality control in vehicle production benefits greatly from the ability to detect production faults through characteristic noises.\r\nIncorrectly assembled parts or defective components often reveal themselves through atypical sound patterns.\r\n\r\n###Building diagnostics\r\n\r\nIn building diagnostics, noise localisation opens up completely new possibilities.\r\nLeaks at windows and doors can be detected regardless of outside temperature \u2013 a major advantage over thermographic methods that depend on temperature differences.\r\n\r\nHouse noises that disturb residents can be identified through a systematic approach.\r\nDisturbing sounds often come from heating pumps, fans or other technical systems located in hidden areas.\r\n\r\nTesting the building structure for sound-conducting paths helps with noise control planning.\r\nCracks in masonry or improperly laid pipes can form significant sound bridges that are difficult to detect using conventional methods.\r\n\r\n##Practical tips for effective noise localisation\r\n###Systematic approach in buildings\r\n\r\nSuccessful noise localisation in buildings requires a methodical approach.\r\nThe first step is to systematically switch off electrical devices.\r\nFridge, heating pump, ventilation systems and other loads are switched off one after the other to eliminate interfering noises.\r\n\r\nKeeping a room logbook has proven useful.\r\nAll observations are documented in it: which noises occur at what times?\r\nHow do noise patterns change with different settings?\r\nThis information is extremely helpful for later analysis.\r\n\r\n[image id=\"14831\"]\r\n\r\nOpening windows can help distinguish between indoor and outdoor noises.\r\nDifferent sound sources often overlap, and only through targeted manipulation of the environment can the individual components be separated.\r\n\r\nExamination of the building structure should include both visual and acoustic aspects.\r\nCracks in plaster or loose cladding can transmit structure-borne sound and make distant noise sources audible in unexpected places.\r\n\r\n###Optimising the measurement technique\r\n\r\nThe positioning of the microphone array is crucial for the quality of measurement results.\r\nIdeally, the camera should be positioned so that as many potential sources as possible are within the capture area.\r\nReflections from walls and other surfaces must be taken into account.\r\n\r\nAmbient noise can greatly complicate analysis.\r\nModern devices offer various filters to suppress constant background noise.\r\nFor transient events \u2013 short noise events \u2013 a high frame rate is required to capture the events.\r\n\r\nThe combination of image, sound and video enables comprehensive documentation.\r\nMany systems allow exporting individual images or recording longer video sequences.\r\nThese recordings are valuable for later analysis or as evidence for clients.\r\n\r\n##Selection criteria and investment costs\r\n\r\nThe choice of the right equipment depends on several factors.\r\nEntry-level devices are available from 990 euros including accessories and are suitable for basic applications such as leak detection or simple machine diagnostics.\r\n\r\nFor professional applications with higher accuracy requirements, costs increase accordingly.\r\nSystems with large microphone arrays and extended analysis functions can easily reach five-figure amounts.\r\nA problem analysis before the purchase decision is important: which types of noise sources are to be localised?\r\nIn which environments will measurements be taken?\r\nWhat resolution is required?\r\n\r\nIndividual consultation by experts is usually indispensable.\r\nMany manufacturers offer test installations where the devices can be tried out under real conditions.\r\nThis helps to assess whether a system meets the requirements.\r\n\r\nTraining of staff should be taken into account when planning the investment.\r\nWhile basic operation is often intuitive, professional applications require deeper knowledge of measurement technology and signal processing.\r\n\r\n##Frequently asked questions (FAQ)\r\n###How accurate is localisation with acoustic cameras?\r\n\r\nModern beamforming methods achieve a spatial resolution of a few centimetres under optimal conditions.\r\nHowever, accuracy depends on several factors: the frequency of the signal, the distance to the source and the ambient noise.\r\nLow-frequency signals below 500 Hz are fundamentally more difficult to localise than high-frequency ones because the wavelength is larger than the distance between the microphones.\r\n\r\n###Can acoustic cameras also be used during operation?\r\n\r\nYes, intelligent filtering allows background noise to be selectively suppressed.\r\nSpecial algorithms enable localisation even in noisy industrial environments.\r\nThe system can distinguish between constant background noise and the sound sources under investigation.\r\nMeasurements are therefore possible without interrupting operations, which is a significant advantage over other diagnostic methods.\r\n\r\n###Which frequency ranges can be captured with acoustic cameras?\r\n\r\nStandard devices capture frequencies from around 200 Hz to 20 kHz, which corresponds to the audible range.\r\nSpecial ultrasound cameras can detect frequencies up to 100 kHz and above.\r\nThe different microphone configurations are optimised for specific frequency ranges \u2013 large arrays with wider spacing for low frequencies, compact arrays for high frequencies and ultrasound.\r\n\r\n###How long does a typical noise localisation take?\r\n\r\nSimple compressed air leaks can be localised within minutes once the device has been positioned and calibrated.\r\nComplex machine diagnostics, on the other hand, require 30\u201360 minutes depending on the scope of the investigation.\r\nPreparation \u2013 optimal positioning, adjusting settings, switching off interference sources \u2013 should be planned additionally and can easily take an hour in unknown environments.\r\n\r\n###Do you need special training to operate the devices?\r\n\r\nBasic operation of modern devices is possible after a short introduction, as the user interfaces are designed to be intuitive.\r\nFor professional applications with detailed analysis, however, 1\u20132 days of training are recommended.\r\nManufacturers usually offer practical courses in which participants learn on real examples how to identify and analyse different types of sound sources.\r\n","related_articles":[1659]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Localise sound: Modern methods and technologies<\/title>\n<meta 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