brett said if a new federal government decided to withdraw the workforce supplement funding after the first year dpg had agreed to fund a 3 % increase in the second and third years of the agreement
Pure helium is a medium that allows sound to pass through it more quickly than air, so it makes your voice sound higher pitched (the mechanics are similar to speeding up a video and hearing the sound pitch up). Some gases will do the opposite; most commonly, sulfur hexaflouride, which slows down sound waves.
What causes the voice change as our parent ages? Recently mom, age 72, has been ill. I took her in for a cat scan yesterday because it looks like gallbladder. Anyway, past year or so, I had been noticing a voice change to a higher pitch and less steady tone. Since she has been sick and weak, her voice has changed even more as described above, I was just wondering what causes the higher pitch, wavering voice.