Why Does Inhaling Helium Change How Your Voice Sounds? [VIDEO]

The sound of your voice starts in your voice box. Within the voice box, there are vocal cords which vibrate against each other creating sound whenever you talk. On its own, it is just a simple buzzing sound.  But, when it reaches your vocal tract, the sound waves start bouncing around. Those reflections interfere with each other which creates a mix of other frequencies resulting in your very own unique voice. So even though your voice starts out as one frequency, it ends up as a mix of multipl…

11/11/2020 0

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What Causes the Knocking Sound in an MRI Scanner?

Anybody who has undergone an MRI scan can tell you that other than the claustrophobia of being in an enclosed cylinder, the other bothersome part is the knocking sound that occurs. Here's a video (see below) that localizes where and why that knocking sound occurs. The bottom line is that the sound is due to a helium pump that disperses liquid helium in order to cool the wires that control the magnets down to -269.1 degrees Celsius. MRI machines work by generating a very large magnetic f…

10/29/2014 0

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ENT Uses Laser Resulting in Patient Death

In 2010, an ENT used a Sharplan laser with an Omniguide Sidefire Adapter to address a superficial lip hemangioma. The tip of the laser probe was inserted through a small incision made to one side of the hemangioma and activated. Seconds later, the lip and surrounding tissues immediately swelled up indicating trapped gas. A second incision was made in an attempt to release the buildup of gas (analagous to popping a balloon to release air). A short time later, the patient's vital signs dr…

12/27/2012 2

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