Core technology
Acoustic cleaning vs ultrasonic cleaning
Also known as sonic cleaning vs ultrasonic cleaning, acoustic vs ultrasonic cleaning.
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.
Side-by-side comparison
| Attribute | Acoustic cleaning | Ultrasonic cleaning |
|---|---|---|
| Frequency band | 12–450 Hz (audible / infrasonic) | 20 kHz–400 kHz (ultrasonic) |
| Transmission medium | Air or flue gas | Liquid bath (water + detergent or solvent) |
| Cleaning mechanism | Acoustic vibration dislodges loose particulate | Cavitation — imploding microbubbles scrub surfaces |
| Mode | In situ, online, continuous | Off-line, immersion of removed part |
| Scale of target | Industrial vessels: boilers, ESPs, baghouses, silos | Small parts: jewellery, surgical instruments, electronics, machined components |
| Typical equipment | Sonic horn, infrasonic cleaner, acoustic cleaning system | Ultrasonic tank, transducer plate, generator |
| Power level | 140–180 dB acoustic SPL | 25–500 W per litre of bath |
| Sector | Power, cement, pulp & paper, WtE, refining, mining | Medical, dental, jewellery, optics, electronics manufacturing |
What they share
Only the broad principle that mechanical vibration can dislodge bonded matter without abrasive contact. The wavelengths, equipment, target sizes and economics overlap nowhere.
Why the confusion exists
Both technologies are sometimes labelled "sonic cleaning" in informal usage, and both rely on the language of acoustics. Search-engine results for sonic cleaning mix the two indiscriminately. A specifier looking to clean a hopper, a baghouse or a boiler should follow the 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.
Related terms
Related terms
- Acoustic cleanerAn 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.
- Sonic hornA 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.
- Infrasonic cleanerAn 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.