[{"data":1,"prerenderedAt":963},["ShallowReactive",2],{"site-footer-common":3,"glossary:industrial-sonic-horn":45,"glossary-related:industrial-sonic-horn":294},{"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":274,"description":275,"extension":276,"meta":277,"navigation":278,"path":279,"relatedTerms":280,"seo":285,"sources":288,"stem":292,"term":47,"__hash__":293},"glossary\u002Fglossary\u002Findustrial-sonic-horn.md","Industrial sonic horn",[49,50],"industrial acoustic horn","process sonic horn",{"type":52,"value":53,"toc":267},"minimark",[54,68,167,172,209,213,239,243],[55,56,57,58,62,63,67],"p",{},"An ",[59,60,61],"strong",{},"industrial sonic horn"," is a pneumatically-driven low-frequency sound emitter used to remove particulate fouling from inside process equipment. The qualifier ",[64,65,66],"em",{},"industrial"," exists to distinguish this device from three unrelated product categories that share the word \"horn\":",[69,70,71,93],"table",{},[72,73,74],"thead",{},[75,76,77,81,84,87,90],"tr",{},[78,79,80],"th",{},"Category",[78,82,83],{},"Purpose",[78,85,86],{},"Frequency",[78,88,89],{},"Typical SPL",[78,91,92],{},"Sector",[94,95,96,116,133,150],"tbody",{},[75,97,98,104,107,110,113],{},[99,100,101,103],"td",{},[59,102,47],{}," (this entry)",[99,105,106],{},"Cleaning fouling from process equipment",[99,108,109],{},"60–400 Hz",[99,111,112],{},"140–180 dB",[99,114,115],{},"Power, cement, pulp & paper, WtE, refining",[75,117,118,121,124,127,130],{},[99,119,120],{},"Automotive horn",[99,122,123],{},"Driver-to-driver signalling",[99,125,126],{},"200–500 Hz",[99,128,129],{},"100–110 dB",[99,131,132],{},"Cars, trucks, motorcycles",[75,134,135,138,141,144,147],{},[99,136,137],{},"Marine \u002F ship's horn",[99,139,140],{},"Vessel signalling under COLREGs",[99,142,143],{},"70–525 Hz",[99,145,146],{},"120–143 dB",[99,148,149],{},"Commercial shipping",[75,151,152,155,158,161,164],{},[99,153,154],{},"Alarm or signalling horn",[99,156,157],{},"Evacuation, plant alarm",[99,159,160],{},"400–4,000 Hz",[99,162,163],{},"100–120 dB",[99,165,166],{},"Building safety, ATEX alarms",[168,169,171],"h2",{"id":170},"why-the-disambiguation-matters","Why the disambiguation matters",[55,173,174,175,179,180,183,184,187,188,179,191,179,194,197,198,203,204,208],{},"Search engines aggregate all four categories under generic queries such as ",[176,177,178],"code",{},"sonic horn",", ",[176,181,182],{},"acoustic horn"," and ",[176,185,186],{},"industrial horn",". Pages targeting industrial buyers benefit from leading with the disambiguation in the first paragraph — explicit reference to ",[64,189,190],{},"process equipment cleaning",[64,192,193],{},"low-frequency",[64,195,196],{},"pneumatic",", and named applications such as ",[199,200,202],"a",{"href":201},"\u002Fglossary\u002Felectrostatic-precipitator","ESPs"," or ",[199,205,207],{"href":206},"\u002Fglossary\u002Ffabric-filter","baghouses"," — both for human readers and for LLM-driven AI Overviews that increasingly cite the most clearly framed source.",[168,210,212],{"id":211},"same-hardware-several-names","Same hardware, several names",[55,214,215,216,179,219,179,222,179,226,179,230,203,234,238],{},"Within the industrial-cleaning category itself, the same device is commonly referred to as a ",[199,217,178],{"href":218},"\u002Fglossary\u002Fsonic-horn",[199,220,182],{"href":221},"\u002Fglossary\u002Facoustic-horn",[199,223,225],{"href":224},"\u002Fglossary\u002Facoustic-cleaner","acoustic cleaner",[199,227,229],{"href":228},"\u002Fglossary\u002Fsonic-sootblower","sonic sootblower",[199,231,233],{"href":232},"\u002Fglossary\u002Fsonic-blower","sonic blower",[199,235,237],{"href":236},"\u002Fglossary\u002Fpneumatic-acoustic-cleaner","pneumatic acoustic cleaner",". All point back to the same hardware family.",[168,240,242],{"id":241},"related-terms","Related terms",[244,245,246,252,257,262],"ul",{},[247,248,249],"li",{},[199,250,251],{"href":218},"Sonic horn",[247,253,254],{},[199,255,256],{"href":221},"Acoustic horn",[247,258,259],{},[199,260,261],{"href":224},"Acoustic cleaner",[247,263,264],{},[199,265,266],{"href":236},"Pneumatic acoustic cleaner",{"title":268,"searchDepth":269,"depth":269,"links":270},"",2,[271,272,273],{"id":170,"depth":269,"text":171},{"id":211,"depth":269,"text":212},{"id":241,"depth":269,"text":242},"core-technology","An industrial sonic horn is a pneumatically-driven low-frequency sound emitter used to remove particulate fouling from inside process equipment. The qualifier industrial exists to distinguish this device from three unrelated product categories that share the word \"horn\":","md",{},true,"\u002Fglossary\u002Findustrial-sonic-horn",[281,282,283,284],"sonic-horn","acoustic-horn","acoustic-cleaner","pneumatic-acoustic-cleaner",{"title":286,"description":287},"Industrial sonic horn — disambiguation from automotive and signalling horns","An industrial sonic horn is a pneumatically-driven low-frequency sound emitter used to clean process equipment. It is distinct from automotive, marine and alarm signalling horns.",[289],{"title":290,"url":291},"Wikipedia — Acoustic cleaning","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FAcoustic_cleaning","glossary\u002Findustrial-sonic-horn","EIbYTrKnKlj5GBHJDs_z0GMO0YUiYq_FWoxHWnyEUjA",[295,517,618,780],{"id":296,"title":251,"aliases":297,"body":300,"category":274,"description":494,"extension":276,"meta":495,"navigation":278,"path":218,"relatedTerms":496,"seo":502,"sources":505,"stem":515,"term":251,"__hash__":516},"glossary\u002Fglossary\u002Fsonic-horn.md",[298,299,61],"sonic horns","sonic cleaning horn",{"type":52,"value":301,"toc":487},[302,328,332,340,344,404,408,445,449,457,459],[55,303,304,305,307,308,310,311,179,313,179,315,179,319,183,323,327],{},"A ",[59,306,178],{}," 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 ",[199,309,225],{"href":224}," and the default specification for cleaning ",[199,312,202],{"href":201},[199,314,207],{"href":206},[199,316,318],{"href":317},"\u002Fglossary\u002Fselective-catalytic-reduction","SCR catalysts",[199,320,322],{"href":321},"\u002Fglossary\u002Fsuperheater","boiler heat-transfer surfaces",[199,324,326],{"href":325},"\u002Fglossary\u002Fhopper","hoppers and silos",".",[168,329,331],{"id":330},"how-a-sonic-horn-works","How a sonic horn works",[55,333,334,335,339],{},"Compressed plant air admitted through a ",[199,336,338],{"href":337},"\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.",[168,341,343],{"id":342},"key-parameters","Key parameters",[69,345,346,356],{},[72,347,348],{},[75,349,350,353],{},[78,351,352],{},"Parameter",[78,354,355],{},"Typical range",[94,357,358,365,372,380,388,396],{},[75,359,360,363],{},[99,361,362],{},"Fundamental frequency",[99,364,109],{},[75,366,367,370],{},[99,368,369],{},"Sound pressure level",[99,371,112],{},[75,373,374,377],{},[99,375,376],{},"Compressed-air consumption",[99,378,379],{},"8–14 Nm³\u002Fmin at 4–7 bar",[75,381,382,385],{},[99,383,384],{},"Operating temperature (with appropriate materials)",[99,386,387],{},"−40 °C to +500 °C",[75,389,390,393],{},[99,391,392],{},"Firing cycle",[99,394,395],{},"5–15 s burst, repeated every 3–15 minutes",[75,397,398,401],{},[99,399,400],{},"Mass",[99,402,403],{},"15–60 kg depending on horn size",[168,405,407],{"id":406},"frequency-selection","Frequency selection",[55,409,410,411,179,415,419,420,179,424,428,429,179,432,436,437,183,441,327],{},"Lower frequencies (60–125 Hz) project longer wavelengths and penetrate further into large open vessels — ",[199,412,414],{"href":413},"\u002Fglossary\u002Fpreheater-cyclone","preheater cyclones",[199,416,418],{"href":417},"\u002Fglossary\u002Frecovery-boiler","recovery-boiler superheaters",", large ",[199,421,423],{"href":422},"\u002Fglossary\u002Fesp-field-bus-section","ESP fields",[199,425,427],{"href":426},"\u002Fglossary\u002Fsilo","silos",". Higher frequencies (230–400 Hz) carry more energy per unit volume and suit finer dust loads in ",[199,430,431],{"href":206},"fabric-filter compartments",[199,433,435],{"href":434},"\u002Fglossary\u002Fhoneycomb-catalyst","catalyst layers"," and smaller hopper geometries. See ",[199,438,440],{"href":439},"\u002Fglossary\u002Flow-frequency-acoustic-cleaner","low-frequency acoustic cleaner",[199,442,444],{"href":443},"\u002Fglossary\u002Fhigh-frequency-acoustic-cleaner","high-frequency acoustic cleaner",[168,446,448],{"id":447},"sonic-horn-vs-steam-sootblower","Sonic horn vs steam sootblower",[55,450,451,452,456],{},"Sonic horns are increasingly specified alongside or in place of ",[199,453,455],{"href":454},"\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.",[168,458,242],{"id":241},[244,460,461,465,470,476,482],{},[247,462,463],{},[199,464,261],{"href":224},[247,466,467],{},[199,468,469],{"href":228},"Sonic sootblower",[247,471,472],{},[199,473,475],{"href":474},"\u002Fglossary\u002Fbell-horn","Bell horn",[247,477,478],{},[199,479,481],{"href":480},"\u002Fglossary\u002Fdiaphragm-horn","Diaphragm horn",[247,483,484],{},[199,485,486],{"href":439},"Low-frequency acoustic cleaner",{"title":268,"searchDepth":269,"depth":269,"links":488},[489,490,491,492,493],{"id":330,"depth":269,"text":331},{"id":342,"depth":269,"text":343},{"id":406,"depth":269,"text":407},{"id":447,"depth":269,"text":448},{"id":241,"depth":269,"text":242},"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.",{},[283,497,498,499,500,501],"acoustic-cleaning-system","sonic-sootblower","bell-horn","diaphragm-horn","low-frequency-acoustic-cleaner",{"title":503,"description":504},"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.",[506,509,512],{"title":507,"url":508},"Power Engineering — Sonic Horns: A User's Introduction","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Fsonic-horns-a-userrsquos-introduction\u002F",{"title":510,"url":511},"Power Engineering — Tuning in to Acoustic Cleaning","https:\u002F\u002Fwww.power-eng.com\u002Fcoal\u002Ftuning-in-to-acoustic-cleaning\u002F",{"title":513,"url":514},"Wikipedia — Sonic soot blowers","https:\u002F\u002Fen.wikipedia.org\u002Fwiki\u002FSonic_soot_blowers","glossary\u002Fsonic-horn","YzrhN0kKzqSaQo0wfn0rueNZ-V43mcg5zahqeWi3lnU",{"id":518,"title":256,"aliases":519,"body":521,"category":274,"description":605,"extension":276,"meta":606,"navigation":278,"path":221,"relatedTerms":607,"seo":608,"sources":611,"stem":616,"term":256,"__hash__":617},"glossary\u002Fglossary\u002Facoustic-horn.md",[520,49],"acoustic horns",{"type":52,"value":522,"toc":600},[523,534,538,541,561,564,568,580,582],[55,524,57,525,527,528,530,531,533],{},[59,526,182],{}," is the broader engineering term for a horn-shaped sound emitter that projects high-intensity low-frequency sound for industrial cleaning duty. In day-to-day procurement and trade-press writing the term is used interchangeably with ",[199,529,178],{"href":218},"; academic and European specification documents tend to prefer \"acoustic horn\" while North American power-industry literature prefers \"sonic horn\" or \"",[199,532,229],{"href":228},"\".",[168,535,537],{"id":536},"why-the-two-names-co-exist","Why the two names co-exist",[55,539,540],{},"Three lineages converge on the same device:",[244,542,543,549,555],{},[247,544,545,548],{},[59,546,547],{},"Acoustical engineering"," literature describes any directional sound source with an exponential or conical flare as an \"acoustic horn\", regardless of frequency or intended use.",[247,550,551,554],{},[59,552,553],{},"Power-industry practice"," in the United States adopted \"sonic horn\" as the catalogue term in the 1980s, paralleling \"sonic sootblower\".",[247,556,557,560],{},[59,558,559],{},"European industrial procurement"," has retained \"acoustic horn\" and \"acoustic cleaner\" as the dominant phrasing in tender specifications.",[55,562,563],{},"The hardware, frequencies, sound-pressure levels, mounting and control logic are identical across all three usages.",[168,565,567],{"id":566},"seo-and-search-behaviour","SEO and search behaviour",[55,569,570,571,573,574,576,577,579],{},"Specifiers searching ",[176,572,182],{}," typically land on industrial, audio-engineering and signalling (ship's horn, alarm-horn) results in the same SERP — the term is more ambiguous than ",[176,575,178],{},". Pages targeting this query benefit from disambiguation copy in the first paragraph (industrial cleaning duty, not signalling) and from cross-linking to the ",[199,578,61],{"href":279}," disambiguator.",[168,581,242],{"id":241},[244,583,584,588,592,596],{},[247,585,586],{},[199,587,251],{"href":218},[247,589,590],{},[199,591,261],{"href":224},[247,593,594],{},[199,595,475],{"href":474},[247,597,598],{},[199,599,47],{"href":279},{"title":268,"searchDepth":269,"depth":269,"links":601},[602,603,604],{"id":536,"depth":269,"text":537},{"id":566,"depth":269,"text":567},{"id":241,"depth":269,"text":242},"An acoustic horn is the broader engineering term for a horn-shaped sound emitter that projects high-intensity low-frequency sound for industrial cleaning duty. In day-to-day procurement and trade-press writing the term is used interchangeably with sonic horn; academic and European specification documents tend to prefer \"acoustic horn\" while North American power-industry literature prefers \"sonic horn\" or \"sonic sootblower\".",{},[281,283,499,501],{"title":609,"description":610},"Acoustic horn — definition and how it differs from a sonic horn","An acoustic horn is the broader term for any low-frequency horn-shaped sound emitter used in industrial cleaning. In commercial practice it is interchangeable with sonic horn.",[612,615],{"title":613,"url":614},"Power Magazine — The Theory and Application of Acoustic Cleaners","https:\u002F\u002Fwww.powermag.com\u002Fthe-theory-and-application-of-acoustic-cleaners\u002F",{"title":290,"url":291},"glossary\u002Facoustic-horn","k-_lUmlIQZ_60EsbB3p9XJ15z-UxJ7SG7xyX-jsbd2o",{"id":619,"title":261,"aliases":620,"body":623,"category":274,"description":766,"extension":276,"meta":767,"navigation":278,"path":224,"relatedTerms":768,"seo":771,"sources":774,"stem":778,"term":261,"__hash__":779},"glossary\u002Fglossary\u002Facoustic-cleaner.md",[621,622],"acoustic cleaners","acoustic cleaning device",{"type":52,"value":624,"toc":760},[625,630,634,637,641,644,721,725,736,738],[55,626,57,627,629],{},[59,628,225],{}," 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.",[168,631,633],{"id":632},"how-an-acoustic-cleaner-works","How an acoustic cleaner works",[55,635,636],{},"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.",[168,638,640],{"id":639},"where-acoustic-cleaners-are-used","Where acoustic cleaners are used",[55,642,643],{},"Acoustic cleaners are installed throughout the gas path and bulk-solids path of heavy industry:",[244,645,646,663,677,694,709],{},[247,647,648,651,652,179,656,179,659],{},[59,649,650],{},"Combustion plant"," — boilers, ",[199,653,655],{"href":654},"\u002Fglossary\u002Feconomiser","economisers",[199,657,658],{"href":321},"superheaters",[199,660,662],{"href":661},"\u002Fglossary\u002Fair-heater","air heaters",[247,664,665,668,669,179,672,179,675],{},[59,666,667],{},"Air-pollution control"," — ",[199,670,671],{"href":201},"electrostatic precipitators",[199,673,674],{"href":206},"fabric filters",[199,676,318],{"href":317},[247,678,679,668,682,685,686,183,690],{},[59,680,681],{},"Bulk solids",[199,683,684],{"href":325},"hoppers, silos and bunkers"," prone to ",[199,687,689],{"href":688},"\u002Fglossary\u002Fbridging","bridging",[199,691,693],{"href":692},"\u002Fglossary\u002Frat-holing","rat-holing",[247,695,696,668,699,179,701,179,705],{},[59,697,698],{},"Cement",[199,700,414],{"href":413},[199,702,704],{"href":703},"\u002Fglossary\u002Fcalciner","calciners",[199,706,708],{"href":707},"\u002Fglossary\u002Fkiln-inlet-riser-duct","kiln inlets",[247,710,711,668,714,179,717],{},[59,712,713],{},"Pulp and paper",[199,715,716],{"href":417},"kraft recovery boilers",[199,718,720],{"href":719},"\u002Fglossary\u002Flime-kiln","lime kilns",[168,722,724],{"id":723},"acoustic-cleaners-are-not-ultrasonic-cleaners","Acoustic cleaners are not ultrasonic cleaners",[55,726,727,728,731,732,327],{},"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 ",[64,729,730],{},"in situ"," with airborne sound. Ultrasonic cleaners operate above 20 kHz inside a liquid bath and clean small parts off-line by cavitation. See ",[199,733,735],{"href":734},"\u002Fglossary\u002Facoustic-cleaning-vs-ultrasonic-cleaning","acoustic cleaning vs ultrasonic cleaning",[168,737,242],{"id":241},[244,739,740,746,750,754],{},[247,741,742],{},[199,743,745],{"href":744},"\u002Fglossary\u002Facoustic-cleaning-system","Acoustic cleaning system",[247,747,748],{},[199,749,251],{"href":218},[247,751,752],{},[199,753,469],{"href":228},[247,755,756],{},[199,757,759],{"href":758},"\u002Fglossary\u002Finfrasonic-cleaner","Infrasonic cleaner",{"title":268,"searchDepth":269,"depth":269,"links":761},[762,763,764,765],{"id":632,"depth":269,"text":633},{"id":639,"depth":269,"text":640},{"id":723,"depth":269,"text":724},{"id":241,"depth":269,"text":242},"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.",{},[497,281,498,769,501,770],"infrasonic-cleaner","high-frequency-acoustic-cleaner",{"title":772,"description":773},"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.",[775,776,777],{"title":613,"url":614},{"title":510,"url":511},{"title":290,"url":291},"glossary\u002Facoustic-cleaner","MwPOKb4JllxnhygiJ3--SHn7B_zEw8BdkQXIXUCoV0E",{"id":781,"title":266,"aliases":782,"body":785,"category":274,"description":950,"extension":276,"meta":951,"navigation":278,"path":236,"relatedTerms":952,"seo":956,"sources":959,"stem":961,"term":266,"__hash__":962},"glossary\u002Fglossary\u002Fpneumatic-acoustic-cleaner.md",[783,784],"pneumatically driven acoustic cleaner","compressed-air sonic horn",{"type":52,"value":786,"toc":944},[787,800,804,807,850,854,900,904,916,918],[55,788,304,789,791,792,794,795,799],{},[59,790,237],{}," is an industrial ",[199,793,178],{"href":218}," driven by compressed plant air rather than by an electrical, hydraulic or steam source. The pneumatic design dominates the industrial acoustic-cleaning market because it places no electrical parts inside the gas path, tolerates dirty utility air, and matches naturally to the ",[199,796,798],{"href":797},"\u002Fglossary\u002Fatex-directive","ATEX"," Zone 20\u002F21\u002F22 dust environments where most cleaning targets sit.",[168,801,803],{"id":802},"why-pneumatic-not-electric","Why pneumatic, not electric",[55,805,806],{},"Industrial cleaning duty is dominated by three constraints that favour compressed air:",[808,809,810,834,840],"ol",{},[247,811,812,815,816,179,820,179,824,179,827,179,830,833],{},[59,813,814],{},"Hazardous-area classification."," Most cleaning targets — ",[199,817,819],{"href":818},"\u002Fglossary\u002Fbunker-coal-bunker","coal bunkers",[199,821,823],{"href":822},"\u002Fglossary\u002Ffly-ash-hopper","fly-ash hoppers",[199,825,826],{"href":426},"biomass silos",[199,828,829],{"href":413},"cement preheater cyclones",[199,831,832],{"href":417},"recovery boilers"," — are classified for combustible dust. A pneumatic driver removes electrical ignition risk entirely from the horn body.",[247,835,836,839],{},[59,837,838],{},"Utility availability."," Every industrial site already runs an instrument-air or plant-air network sized for sootblowers, pneumatic vibrators, control valves and tools. Adding sonic horns rarely requires a new utility.",[247,841,842,845,846,849],{},[59,843,844],{},"Tolerance."," Compressed industrial air contains water, oil mist and particulate; a metal ",[199,847,848],{"href":480},"diaphragm horn"," tolerates this far better than any electromechanical sound source of comparable output.",[168,851,853],{"id":852},"typical-utility-requirements","Typical utility requirements",[69,855,856,866],{},[72,857,858],{},[75,859,860,863],{},[78,861,862],{},"Specification",[78,864,865],{},"Typical value",[94,867,868,876,884,892],{},[75,869,870,873],{},[99,871,872],{},"Supply pressure",[99,874,875],{},"4–7 bar (60–100 psi)",[75,877,878,881],{},[99,879,880],{},"Consumption per horn (10-second burst)",[99,882,883],{},"8–14 Nm³\u002Fmin",[75,885,886,889],{},[99,887,888],{},"Air quality",[99,890,891],{},"Dried instrument air preferred; plant air acceptable with adequate filtration",[75,893,894,897],{},[99,895,896],{},"Connection",[99,898,899],{},"DN25–DN50 thread or flange",[168,901,903],{"id":902},"what-pneumatic-implies-for-procurement","What \"pneumatic\" implies for procurement",[55,905,906,907,910,911,915],{},"Specifiers writing an RFQ for a pneumatic acoustic cleaner should also size the compressed-air receiver, the regulator and the pilot ",[199,908,909],{"href":337},"solenoid valves"," for the simultaneous-firing case. A common engineering error is to under-size the air receiver, leaving the horn unable to sustain its rated ",[199,912,914],{"href":913},"\u002Fglossary\u002Fsound-pressure-level","SPL"," during multi-horn cycles.",[168,917,242],{"id":241},[244,919,920,924,928,934,939],{},[247,921,922],{},[199,923,251],{"href":218},[247,925,926],{},[199,927,261],{"href":224},[247,929,930],{},[199,931,933],{"href":932},"\u002Fglossary\u002Fcompressed-air","Compressed air",[247,935,936],{},[199,937,938],{"href":337},"Solenoid valve",[247,940,941],{},[199,942,943],{"href":797},"ATEX directive",{"title":268,"searchDepth":269,"depth":269,"links":945},[946,947,948,949],{"id":802,"depth":269,"text":803},{"id":852,"depth":269,"text":853},{"id":902,"depth":269,"text":903},{"id":241,"depth":269,"text":242},"A pneumatic acoustic cleaner is an industrial sonic horn driven by compressed plant air rather than by an electrical, hydraulic or steam source. The pneumatic design dominates the industrial acoustic-cleaning market because it places no electrical parts inside the gas path, tolerates dirty utility air, and matches naturally to the ATEX Zone 20\u002F21\u002F22 dust environments where most cleaning targets sit.",{},[283,281,953,954,955],"compressed-air","solenoid-valve","cycle-controller-sequencer",{"title":957,"description":958},"Pneumatic acoustic cleaner — compressed-air sonic horn explained","A pneumatic acoustic cleaner is a sonic horn driven by compressed plant air. The pneumatic design dominates industrial acoustic cleaning because it has no electrical parts in the gas path.",[960],{"title":613,"url":614},"glossary\u002Fpneumatic-acoustic-cleaner","CmN6RQgE83lF1QmPn-rvEFRCZOGmpQqASpK3J82Tm18",1782613733154]