InterviewSolution
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InterviewSolution
| 1. |
Why ultrasonic waves does not harm our body during ultrasonography? |
| Answer» One of the most well known effects of\xa0ultrasound is\xa0that as\xa0Ultrasound waves\xa0pass through a tissue they tend to heat it up. ... Although\xa0Ultrasound\xa0cannot be heard by\xa0humans, at high decibels it\xa0can\xa0still cause direct damage to\xa0human\xa0ears.\xa0Ultrasound\xa0in excess of 120 decibels may cause Hearing damage.\xa0Ultrasound\xa0is nothing but sound\xa0waves\xa0with frequencies higher than the upper\xa0audible\xa0limit of\xa0human\xa0hearing.\xa0Ultrasound\xa0is\xa0no\xa0different from \'normal\' (audible) sound in its physical properties, except in that\xa0humans\xa0cannot hear it. ... Hence,\xa0Ultrasound\xa0which has a range of above 20 kHz (20,000 Hz) can\'t be heard. | |