[{"data":1,"prerenderedAt":863},["ShallowReactive",2],{"site-footer-common":3,"glossary:acoustic-cleaning-vs-ultrasonic-cleaning":45,"glossary-related:acoustic-cleaning-vs-ultrasonic-cleaning":270},{"id":4,"extension":5,"footer":6,"meta":40,"navbar":41,"stem":43,"__hash__":44},"common\u002Fcommon.yml","yml",{"tagline":7,"links":8,"sections":9},"Acoustic cleaning intelligence for industrial fouling, soot, ash, dust and build-up.",[],[10,19,31],{"title":11,"links":12},"Product",[13,16],{"label":14,"to":15},"How it works","\u002F#product",{"label":17,"to":18},"Cost assessment","\u002F#hero",{"title":20,"links":21},"Company",[22,25,28],{"label":23,"to":24},"What we build","\u002F#about",{"label":26,"to":27},"Careers","\u002F#careers",{"label":29,"to":30},"Contact","\u002F#contact",{"title":32,"links":33},"Resources",[34,37],{"label":35,"to":36},"Blog","\u002Fresources\u002Fblog",{"label":38,"to":39},"Glossary","\u002Fglossary",{},{"links":42},[],"common","YocmZRy1AYfBbpgGVms-zhdiABlF8VTxHx6h4rDmZBA",{"id":46,"title":47,"aliases":48,"body":51,"category":248,"description":249,"extension":250,"meta":251,"navigation":252,"path":253,"relatedTerms":254,"seo":258,"sources":261,"stem":268,"term":47,"__hash__":269},"glossary\u002Fglossary\u002Facoustic-cleaning-vs-ultrasonic-cleaning.md","Acoustic cleaning vs ultrasonic cleaning",[49,50],"sonic cleaning vs ultrasonic cleaning","acoustic vs ultrasonic cleaning",{"type":52,"value":53,"toc":240},"minimark",[54,66,71,194,198,201,205,218,222],[55,56,57,61,62,65],"p",{},[58,59,60],"strong",{},"Acoustic cleaning"," and ",[58,63,64],{},"ultrasonic cleaning"," are routinely confused because both use sound to remove unwanted material. In every practical respect — frequency, medium, scale, target, mechanism — they are different technologies for different jobs.",[67,68,70],"h2",{"id":69},"side-by-side-comparison","Side-by-side comparison",[72,73,74,89],"table",{},[75,76,77],"thead",{},[78,79,80,84,86],"tr",{},[81,82,83],"th",{},"Attribute",[81,85,60],{},[81,87,88],{},"Ultrasonic cleaning",[90,91,92,104,115,126,137,148,172,183],"tbody",{},[78,93,94,98,101],{},[95,96,97],"td",{},"Frequency band",[95,99,100],{},"12–450 Hz (audible \u002F infrasonic)",[95,102,103],{},"20 kHz–400 kHz (ultrasonic)",[78,105,106,109,112],{},[95,107,108],{},"Transmission medium",[95,110,111],{},"Air or flue gas",[95,113,114],{},"Liquid bath (water + detergent or solvent)",[78,116,117,120,123],{},[95,118,119],{},"Cleaning mechanism",[95,121,122],{},"Acoustic vibration dislodges loose particulate",[95,124,125],{},"Cavitation — imploding microbubbles scrub surfaces",[78,127,128,131,134],{},[95,129,130],{},"Mode",[95,132,133],{},"In situ, online, continuous",[95,135,136],{},"Off-line, immersion of removed part",[78,138,139,142,145],{},[95,140,141],{},"Scale of target",[95,143,144],{},"Industrial vessels: boilers, ESPs, baghouses, silos",[95,146,147],{},"Small parts: jewellery, surgical instruments, electronics, machined components",[78,149,150,153,169],{},[95,151,152],{},"Typical equipment",[95,154,155,160,161,160,165],{},[156,157,159],"a",{"href":158},"\u002Fglossary\u002Fsonic-horn","Sonic horn",", ",[156,162,164],{"href":163},"\u002Fglossary\u002Finfrasonic-cleaner","infrasonic cleaner",[156,166,168],{"href":167},"\u002Fglossary\u002Facoustic-cleaning-system","acoustic cleaning system",[95,170,171],{},"Ultrasonic tank, transducer plate, generator",[78,173,174,177,180],{},[95,175,176],{},"Power level",[95,178,179],{},"140–180 dB acoustic SPL",[95,181,182],{},"25–500 W per litre of bath",[78,184,185,188,191],{},[95,186,187],{},"Sector",[95,189,190],{},"Power, cement, pulp & paper, WtE, refining, mining",[95,192,193],{},"Medical, dental, jewellery, optics, electronics manufacturing",[67,195,197],{"id":196},"what-they-share","What they share",[55,199,200],{},"Only the broad principle that mechanical vibration can dislodge bonded matter without abrasive contact. The wavelengths, equipment, target sizes and economics overlap nowhere.",[67,202,204],{"id":203},"why-the-confusion-exists","Why the confusion exists",[55,206,207,208,212,213,217],{},"Both technologies are sometimes labelled \"sonic cleaning\" in informal usage, and both rely on the language of acoustics. Search-engine results for ",[209,210,211],"code",{},"sonic cleaning"," mix the two indiscriminately. A specifier looking to clean a hopper, a baghouse or a boiler should follow the ",[156,214,216],{"href":215},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaning"," family of terms; a specifier looking to clean a printed circuit board, a watch movement or a surgical instrument should follow ultrasonic cleaning.",[67,219,221],{"id":220},"related-terms","Related terms",[223,224,225,231,235],"ul",{},[226,227,228],"li",{},[156,229,230],{"href":215},"Acoustic cleaner",[226,232,233],{},[156,234,159],{"href":158},[226,236,237],{},[156,238,239],{"href":163},"Infrasonic cleaner",{"title":241,"searchDepth":242,"depth":242,"links":243},"",2,[244,245,246,247],{"id":69,"depth":242,"text":70},{"id":196,"depth":242,"text":197},{"id":203,"depth":242,"text":204},{"id":220,"depth":242,"text":221},"core-technology","Acoustic cleaning and ultrasonic cleaning are routinely confused because both use sound to remove unwanted material. In every practical respect — frequency, medium, scale, target, mechanism — they are different technologies for different jobs.","md",{},true,"\u002Fglossary\u002Facoustic-cleaning-vs-ultrasonic-cleaning",[255,256,257],"acoustic-cleaner","sonic-horn","infrasonic-cleaner",{"title":259,"description":260},"Acoustic cleaning vs ultrasonic cleaning — what's the difference?","Acoustic cleaning uses audible low-frequency sound to clean industrial process equipment in situ. Ultrasonic cleaning uses high-frequency sound in a liquid bath to clean small parts off-line. They are different technologies for different jobs.",[262,265],{"title":263,"url":264},"Wikipedia — Acoustic cleaning","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAcoustic_cleaning",{"title":266,"url":267},"Wikipedia — Ultrasonic cleaning","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FUltrasonic_cleaning","glossary\u002Facoustic-cleaning-vs-ultrasonic-cleaning","W6R9_hyOEqlmPOYaLRweZj66ISVturCRQgSOUfA1VeU",[271,450,664],{"id":272,"title":230,"aliases":273,"body":276,"category":248,"description":430,"extension":250,"meta":431,"navigation":252,"path":215,"relatedTerms":432,"seo":437,"sources":440,"stem":448,"term":230,"__hash__":449},"glossary\u002Fglossary\u002Facoustic-cleaner.md",[274,275],"acoustic cleaners","acoustic cleaning device",{"type":52,"value":277,"toc":424},[278,285,289,292,296,299,385,389,401,403],[55,279,280,281,284],{},"An ",[58,282,283],{},"acoustic cleaner"," is any device that uses high-intensity sound waves — typically at audible low frequencies between 60 and 450 Hz and sound pressure levels of 140 to 180 dB — to dislodge particulate fouling from inside industrial process equipment. The acoustic energy vibrates dust, ash, soot and other accreted solids, keeping them airborne and entrained in the gas flow so they cannot bond, bridge or harden on internal surfaces.",[67,286,288],{"id":287},"how-an-acoustic-cleaner-works","How an acoustic cleaner works",[55,290,291],{},"A pneumatic driver — usually compressed air at 4 to 7 bar — sets a metal diaphragm or piston-whistle assembly vibrating at the cleaner's design frequency. The vibration is amplified through an exponential bell horn and projected into the equipment as a near-spherical pressure field. Particulate already deposited on tube banks, plates, catalyst layers or hopper walls receives an oscillating force that overcomes adhesion. Because the cleaner is non-contact, it can run while the plant is online, every few minutes, without thermal shock, tube erosion or refractory damage.",[67,293,295],{"id":294},"where-acoustic-cleaners-are-used","Where acoustic cleaners are used",[55,297,298],{},"Acoustic cleaners are installed throughout the gas path and bulk-solids path of heavy industry:",[223,300,301,319,337,355,372],{},[226,302,303,306,307,160,311,160,315],{},[58,304,305],{},"Combustion plant"," — boilers, ",[156,308,310],{"href":309},"\u002Fglossary\u002Feconomiser","economisers",[156,312,314],{"href":313},"\u002Fglossary\u002Fsuperheater","superheaters",[156,316,318],{"href":317},"\u002Fglossary\u002Fair-heater","air heaters",[226,320,321,324,325,160,329,160,333],{},[58,322,323],{},"Air-pollution control"," — ",[156,326,328],{"href":327},"\u002Fglossary\u002Felectrostatic-precipitator","electrostatic precipitators",[156,330,332],{"href":331},"\u002Fglossary\u002Ffabric-filter","fabric filters",[156,334,336],{"href":335},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[226,338,339,324,342,346,347,61,351],{},[58,340,341],{},"Bulk solids",[156,343,345],{"href":344},"\u002Fglossary\u002Fhopper","hoppers, silos and bunkers"," prone to ",[156,348,350],{"href":349},"\u002Fglossary\u002Fbridging","bridging",[156,352,354],{"href":353},"\u002Fglossary\u002Frat-holing","rat-holing",[226,356,357,324,360,160,364,160,368],{},[58,358,359],{},"Cement",[156,361,363],{"href":362},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[156,365,367],{"href":366},"\u002Fglossary\u002Fcalciner","calciners",[156,369,371],{"href":370},"\u002Fglossary\u002Fkiln-inlet-riser-duct","kiln inlets",[226,373,374,324,377,160,381],{},[58,375,376],{},"Pulp and paper",[156,378,380],{"href":379},"\u002Fglossary\u002Frecovery-boiler","kraft recovery boilers",[156,382,384],{"href":383},"\u002Fglossary\u002Flime-kiln","lime kilns",[67,386,388],{"id":387},"acoustic-cleaners-are-not-ultrasonic-cleaners","Acoustic cleaners are not ultrasonic cleaners",[55,390,391,392,396,397,400],{},"The two terms are routinely confused but describe completely different technologies. Acoustic cleaners operate in the audible low-frequency band and clean dry industrial surfaces ",[393,394,395],"em",{},"in situ"," with airborne sound. Ultrasonic cleaners operate above 20 kHz inside a liquid bath and clean small parts off-line by cavitation. See ",[156,398,399],{"href":253},"acoustic cleaning vs ultrasonic cleaning",".",[67,402,221],{"id":220},[223,404,405,410,414,420],{},[226,406,407],{},[156,408,409],{"href":167},"Acoustic cleaning system",[226,411,412],{},[156,413,159],{"href":158},[226,415,416],{},[156,417,419],{"href":418},"\u002Fglossary\u002Fsonic-sootblower","Sonic sootblower",[226,421,422],{},[156,423,239],{"href":163},{"title":241,"searchDepth":242,"depth":242,"links":425},[426,427,428,429],{"id":287,"depth":242,"text":288},{"id":294,"depth":242,"text":295},{"id":387,"depth":242,"text":388},{"id":220,"depth":242,"text":221},"An acoustic cleaner is any device that uses high-intensity sound waves — typically at audible low frequencies between 60 and 450 Hz and sound pressure levels of 140 to 180 dB — to dislodge particulate fouling from inside industrial process equipment. The acoustic energy vibrates dust, ash, soot and other accreted solids, keeping them airborne and entrained in the gas flow so they cannot bond, bridge or harden on internal surfaces.",{},[433,256,434,257,435,436],"acoustic-cleaning-system","sonic-sootblower","low-frequency-acoustic-cleaner","high-frequency-acoustic-cleaner",{"title":438,"description":439},"Acoustic cleaner — definition, principle, industrial uses","An acoustic cleaner is any device that uses high-intensity sound waves to dislodge particulate fouling from inside industrial process equipment such as boilers, ESPs, baghouses and silos.",[441,444,447],{"title":442,"url":443},"Power Magazine — The Theory and Application of Acoustic Cleaners","https:\u002F\u002Fwww.powermag.com\u002Fthe-theory-and-application-of-acoustic-cleaners\u002F",{"title":445,"url":446},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":263,"url":264},"glossary\u002Facoustic-cleaner","MwPOKb4JllxnhygiJ3--SHn7B_zEw8BdkQXIXUCoV0E",{"id":451,"title":159,"aliases":452,"body":456,"category":248,"description":646,"extension":250,"meta":647,"navigation":252,"path":158,"relatedTerms":648,"seo":651,"sources":654,"stem":662,"term":159,"__hash__":663},"glossary\u002Fglossary\u002Fsonic-horn.md",[453,454,455],"sonic horns","sonic cleaning horn","industrial sonic horn",{"type":52,"value":457,"toc":639},[458,482,486,494,498,560,564,598,602,610,612],[55,459,460,461,464,465,467,468,160,471,160,474,160,476,61,479,400],{},"A ",[58,462,463],{},"sonic horn"," is a pneumatically-driven sound emitter that produces high-intensity, low-frequency sound waves — typically between 60 and 400 Hz at sound pressure levels of 140 to 180 dB — used to dislodge particulate fouling from inside industrial process equipment. Sonic horns are the most common form of ",[156,466,283],{"href":215}," and the default specification for cleaning ",[156,469,470],{"href":327},"ESPs",[156,472,473],{"href":331},"baghouses",[156,475,336],{"href":335},[156,477,478],{"href":313},"boiler heat-transfer surfaces",[156,480,481],{"href":344},"hoppers and silos",[67,483,485],{"id":484},"how-a-sonic-horn-works","How a sonic horn works",[55,487,488,489,493],{},"Compressed plant air admitted through a ",[156,490,492],{"href":491},"\u002Fglossary\u002Fsolenoid-valve","solenoid valve"," drives a metal diaphragm — typically titanium or 316 stainless — into resonant oscillation at the horn's fundamental frequency. The oscillating pressure field is amplified by an exponential bell horn and projected into the vessel as a near-spherical sound wave. Particulate already deposited on internal surfaces receives an oscillating acceleration that overcomes adhesion; loosened material is then carried out with the gas flow before it can sinter, bridge or bond. Because the cleaning is acoustic and non-contact, the horn can fire while the plant is online without tube erosion, refractory damage or thermal shock.",[67,495,497],{"id":496},"key-parameters","Key parameters",[72,499,500,510],{},[75,501,502],{},[78,503,504,507],{},[81,505,506],{},"Parameter",[81,508,509],{},"Typical range",[90,511,512,520,528,536,544,552],{},[78,513,514,517],{},[95,515,516],{},"Fundamental frequency",[95,518,519],{},"60–400 Hz",[78,521,522,525],{},[95,523,524],{},"Sound pressure level",[95,526,527],{},"140–180 dB",[78,529,530,533],{},[95,531,532],{},"Compressed-air consumption",[95,534,535],{},"8–14 Nm³\u002Fmin at 4–7 bar",[78,537,538,541],{},[95,539,540],{},"Operating temperature (with appropriate materials)",[95,542,543],{},"−40 °C to +500 °C",[78,545,546,549],{},[95,547,548],{},"Firing cycle",[95,550,551],{},"5–15 s burst, repeated every 3–15 minutes",[78,553,554,557],{},[95,555,556],{},"Mass",[95,558,559],{},"15–60 kg depending on horn size",[67,561,563],{"id":562},"frequency-selection","Frequency selection",[55,565,566,567,160,569,572,573,160,577,581,582,160,585,589,590,61,594,400],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[156,568,363],{"href":362},[156,570,571],{"href":379},"recovery-boiler superheaters",", large ",[156,574,576],{"href":575},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[156,578,580],{"href":579},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[156,583,584],{"href":331},"fabric-filter compartments",[156,586,588],{"href":587},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[156,591,593],{"href":592},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","low-frequency acoustic cleaner",[156,595,597],{"href":596},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[67,599,601],{"id":600},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[55,603,604,605,609],{},"Sonic horns are increasingly specified alongside or in place of ",[156,606,608],{"href":607},"\u002Fglossary\u002Fsteam-sootblower","steam sootblowers"," because they consume no boiler-grade steam, cause no tube erosion, require almost no moving parts and can fire every few minutes without operator intervention. They are less effective on hard, fused slag than retractable steam lances, so on furnace waterwalls and high-temperature superheaters they typically complement rather than replace mechanical cleaning.",[67,611,221],{"id":220},[223,613,614,618,622,628,634],{},[226,615,616],{},[156,617,230],{"href":215},[226,619,620],{},[156,621,419],{"href":418},[226,623,624],{},[156,625,627],{"href":626},"\u002Fglossary\u002Fbell-horn","Bell horn",[226,629,630],{},[156,631,633],{"href":632},"\u002Fglossary\u002Fdiaphragm-horn","Diaphragm horn",[226,635,636],{},[156,637,638],{"href":592},"Low-frequency acoustic cleaner",{"title":241,"searchDepth":242,"depth":242,"links":640},[641,642,643,644,645],{"id":484,"depth":242,"text":485},{"id":496,"depth":242,"text":497},{"id":562,"depth":242,"text":563},{"id":600,"depth":242,"text":601},{"id":220,"depth":242,"text":221},"A sonic horn is a pneumatically-driven sound emitter that produces high-intensity, low-frequency sound waves — typically between 60 and 400 Hz at sound pressure levels of 140 to 180 dB — used to dislodge particulate fouling from inside industrial process equipment. Sonic horns are the most common form of acoustic cleaner and the default specification for cleaning ESPs, baghouses, SCR catalysts, boiler heat-transfer surfaces and hoppers and silos.",{},[255,433,434,649,650,435],"bell-horn","diaphragm-horn",{"title":652,"description":653},"Sonic horn — definition, frequency, SPL and industrial applications","A sonic horn is a pneumatically-driven low-frequency sound emitter (typically 60–400 Hz at 140–180 dB SPL) used to dislodge particulate fouling from boilers, ESPs, baghouses and process vessels.",[655,658,659],{"title":656,"url":657},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":445,"url":446},{"title":660,"url":661},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",{"id":665,"title":239,"aliases":666,"body":670,"category":248,"description":848,"extension":250,"meta":849,"navigation":252,"path":163,"relatedTerms":850,"seo":853,"sources":856,"stem":861,"term":239,"__hash__":862},"glossary\u002Fglossary\u002Finfrasonic-cleaner.md",[667,668,669],"infrasound cleaner","infrasonic cleaning system","sub-audible acoustic cleaner",{"type":52,"value":671,"toc":842},[672,686,690,782,786,805,809,816,818],[55,673,280,674,676,677,679,680,682,683,685],{},[58,675,164],{}," (also written ",[393,678,667],{},") is an ",[156,681,283],{"href":215}," that operates below the threshold of human hearing — typically 12 to 30 Hz, against the 60–400 Hz range of a conventional ",[156,684,463],{"href":158},". The very long wavelength of an infrasonic wave (above 10 metres at 30 Hz) fills a large vessel almost uniformly and penetrates further into deep, baffled or obstructed cavities than higher-frequency horns can reach.",[67,687,689],{"id":688},"how-it-differs-from-a-sonic-horn","How it differs from a sonic horn",[72,691,692,702],{},[75,693,694],{},[78,695,696,698,700],{},[81,697,83],{},[81,699,239],{},[81,701,159],{},[90,703,704,715,726,737,748,759],{},[78,705,706,709,712],{},[95,707,708],{},"Frequency",[95,710,711],{},"12–30 Hz (sub-audible)",[95,713,714],{},"60–400 Hz (audible)",[78,716,717,720,723],{},[95,718,719],{},"Wavelength",[95,721,722],{},"10–28 m",[95,724,725],{},"0.85–5.7 m",[78,727,728,731,734],{},[95,729,730],{},"Penetration",[95,732,733],{},"Excellent, fills the whole vessel",[95,735,736],{},"Directional, projected from the bell",[78,738,739,742,745],{},[95,740,741],{},"Audible noise at the work area",[95,743,744],{},"Very low (mostly inaudible)",[95,746,747],{},"Significant, often requires hearing protection",[78,749,750,753,756],{},[95,751,752],{},"Bell size",[95,754,755],{},"Large (low cut-off frequency demands physical bulk)",[95,757,758],{},"Compact",[78,760,761,764,779],{},[95,762,763],{},"Typical applications",[95,765,766,160,769,773,774,778],{},[156,767,768],{"href":379},"Recovery boilers",[156,770,772],{"href":771},"\u002Fglossary\u002Fwaste-to-energy","WtE"," flue paths, ",[156,775,777],{"href":776},"\u002Fglossary\u002Fheat-recovery-steam-generator","HRSGs",", marine boilers",[95,780,781],{},"Cross-application; default specification",[67,783,785],{"id":784},"where-infrasonic-cleaners-are-preferred","Where infrasonic cleaners are preferred",[55,787,788,789,791,792,796,797,800,801,804],{},"Infrasonic technology was popularised by Swedish suppliers (Infrafone \u002F Heat Management) on pulp-and-paper ",[156,790,380],{"href":379},", where the combination of deep superheater cavities and the strict need to extend the interval between ",[156,793,795],{"href":794},"\u002Fglossary\u002Fchill-and-blow","chill-and-blow"," wash cycles rewards the deeper penetration of long waves. The same logic carries over to large ",[156,798,799],{"href":771},"WtE boilers"," with sticky chloride-laden ash, to ",[156,802,803],{"href":776},"HRSG harp tube banks"," and to large marine boilers where work-area noise must be kept low.",[67,806,808],{"id":807},"when-to-choose-a-sonic-horn-instead","When to choose a sonic horn instead",[55,810,811,812,815],{},"For most baghouse, ESP, hopper and silo applications, a 60–250 Hz ",[156,813,814],{"href":592},"low-frequency sonic horn"," projects enough penetration with a smaller bell, lower capital cost, lower air consumption and simpler integration. Infrasonic cleaners earn their cost where vessel geometry, deposit depth or noise-exposure limits make the long wavelength specifically valuable.",[67,817,221],{"id":220},[223,819,820,824,828,832,837],{},[226,821,822],{},[156,823,230],{"href":215},[226,825,826],{},[156,827,159],{"href":158},[226,829,830],{},[156,831,638],{"href":592},[226,833,834],{},[156,835,836],{"href":379},"Recovery boiler",[226,838,839],{},[156,840,841],{"href":771},"Waste-to-energy",{"title":241,"searchDepth":242,"depth":242,"links":843},[844,845,846,847],{"id":688,"depth":242,"text":689},{"id":784,"depth":242,"text":785},{"id":807,"depth":242,"text":808},{"id":220,"depth":242,"text":221},"An infrasonic cleaner (also written infrasound cleaner) is an acoustic cleaner that operates below the threshold of human hearing — typically 12 to 30 Hz, against the 60–400 Hz range of a conventional sonic horn. The very long wavelength of an infrasonic wave (above 10 metres at 30 Hz) fills a large vessel almost uniformly and penetrates further into deep, baffled or obstructed cavities than higher-frequency horns can reach.",{},[255,256,435,851,852],"recovery-boiler","waste-to-energy",{"title":854,"description":855},"Infrasonic cleaner — sub-20 Hz acoustic cleaning for deep penetration","An infrasonic cleaner operates below the audible threshold (typically 12–30 Hz). The very long wavelength penetrates further than a conventional sonic horn and is preferred on recovery boilers and WtE flue paths.",[857,860],{"title":858,"url":859},"Heat Management — Infrasound Cleaning for Boiler Efficiency","https:\u002F\u002Fheatmanage.com\u002Fknowledge\u002Funlocking-infrasound-cleaning-data-for-boiler-efficiency\u002F",{"title":442,"url":443},"glossary\u002Finfrasonic-cleaner","Oqfo1uKF8ioWxXKH687wPi188BqvEoa3EWC_w2jXmG4",1782613733096]