Eurofins Sac Ky Hai Dang Environment Testing Service Newsletter Q3 2022
An electronic newsletter for customers of Eurofins Sac Ky Hai Dang Environment Testing Services with outstanding information and services in the third quarter of 2022
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Ultrasounds vs Infrasounds Acoustic Survey
Three main ways that ultrasound and infrasound differ from "regular" sounds are taken into account in today’s considerations. The first and most evident property of these sound types is that they are inaudible since, by definition, they have "extreme" frequencies that are outside the range of the human ear's typical response curve (see Figure 1). Ultrasound, which ranges in frequency from roughly 15 kHz to 200 kHz and contains biologically relevant sounds, is too high. The frequency of infrasound, which effectively ranges from 20 Hz to 0.1 Hz or less, is too low.
Ultrasounds / Infrasounds and its adverse health effects
For industrial applications where medium frequency ultrasound is used (40,000 Hz to 100,000 Hz) - in the case of welding, cleaning, or cutting with ultrasound - where the intensity of these waves is selected to heat, cut, or destroy particles of plastic, metal, or other materials, adverse effects may occur when the human body comes into contact with these waves. Meanwhile, on infrasounds, disturbances or discomfort may still occur, such as fatigue, stress, difficulty in concentration, sensitivity to vibration, confusion, headache, decreased respiratory rate, sleep deterioration. These physiological effects could be due to the vibration of the digestive, cardiovascular, respiratory organs, or eyeballs. Beyond the hearing thresholds (above 100 dB), one or more issues and disturbances mentioned above are experienced and/or are amplified. Finally, at extremely high levels (above 140 dB), infrasound can damage hearing, especially in the audible frequency band of infrasound.
Eurofins solutions– Ascoustic Surveys
An Acoustic survey takes Acoustic measurements throughout an entire plant or section to identify noisy areas. Acoustic surveys provide very useful information which enables us to identify:
- Areas, where employees are likely to be exposed to harmful levels of Acoustic and personal dosimetry, may be needed.
- Machines and equipment generate harmful levels of Acoustic.
- Employees who might be exposed to unacceptable Acoustic levels.
- Acoustic control options to reduce Acoustic exposure.
- Variability in Acoustic levels during different operating conditions
- Impact on Acoustic level from modifications or changes in operations
Sound Survey by Eurofins Vietnam in Vung Tau, Vietnam
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Acoustic Survey and Measurement Service |
To send samples or find more information, please contact us at:
Eurofins Sac Ky Hai Dang - Environment Testing Services
- Lot E2b-3, D6 Street, Hi-Tech Park, City. Thu Duc
- Floor M, 141 Nguyen Du, District 1, HCMC
- 4th floor - Building B, No. 103 Van Phuc Street, Ha Dong District, Hanoi
- Room 319, Vietnam - Korea High-Tech Incubator, Road No. 8, Industrial Park Tra Noc 2, O Mon District, City. Can Tho
Hotline: (+84) 28 7107 7879 - Press 1 (see Sales Department)