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2. Conservation and restoration of vinyl discs - Wikipedia

   en.wikipedia.org/wiki/Conservation_and...

   The effectiveness of the ultrasonic machines coupled with their premium price tags (both US$4,000 in January 2015) has opened the door for companies to offer professional ultrasonic cleaning at an affordable cost of just a few dollars per record. [10] Another cleaning product recently released called Record Revirginizer uses a polymer that is ...

3. Ultrasonic cleaning - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic_cleaning

   Ultrasonic cleaning is a process that uses ultrasound (usually from 20 to 40 kHz) to agitate a fluid, with a cleaning effect. Ultrasonic cleaners come in a variety of sizes, from small desktop units with an internal volume of less than 0.5 litres (0.13 US gal), to large industrial units with volumes approaching 1,000 litres (260 US gal).

4. Record restoration - Wikipedia

   en.wikipedia.org/wiki/Record_restoration

   Record restoration, a particular kind of audio restoration, is the process of converting the analog signal stored on gramophone records (either 78 rpm shellac, or 45 and 33⅓ rpm vinyl) into digital audio files that can then be edited with computer software and eventually stored on a hard-drive, recorded to digital tape, or burned to a CD or DVD.

5. Laser turntable - Wikipedia

   en.wikipedia.org/wiki/Laser_turntable

   Records that sound dead quiet on a conventional turntable could sound as if I was munching potato chips while listening to the ELP. Bummer. There's a solution, of course: a record-cleaning machine. This can't be considered an 'accessory' with the LT: it's mandatory. Even new records fresh out of the jacket can sound crunchy." [20] Fremer concludes:

6. Comparison of analog and digital recording - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_analog_and...

   The low-frequency response of vinyl records is restricted by rumble noise (described above), as well as the physical and electrical characteristics of the entire pickup arm and transducer assembly. The high-frequency response of vinyl depends on the cartridge. CD4 records contained frequencies up to 50 kHz. Frequencies of up to 122 kHz have ...

7. The 6 Best Ultrasonic Skin Scrubbers to Fight Acne ... - AOL

   www.aol.com/6-best-ultrasonic-skin-scrubbers...

   For those suffering from acne and blackheads, investing in one of the best ultrasonic skin scrubbers is an effective and safe way to clear, treat and prevent impurities from hindering your ...