"A sound meter measures the pressure of sounds. It is used in measuring the amount of noise pollution, such as aircraft noise. The sound meter does not measure the amount of sound that humans hear. There is a different type of meter used for this."
YES its used a lot in subliminal messages
60 desibell
Any sound wave below roughly 20 Hz or above roughly 20,000 Hz can't be heard by humans.
Humans use muscular energy, sound energy and many other
it makes us communicate.
"A sound meter measures the pressure of sounds. It is used in measuring the amount of noise pollution, such as aircraft noise. The sound meter does not measure the amount of sound that humans hear. There is a different type of meter used for this."
YES its used a lot in subliminal messages
No
Light is what humans process faster
Speech and vocal noises are sounds created by humans.
Humans is my first answer.:-)
the range of sound frequencies that humans can hear is about0to200Hz
LOUDNESS
Torder
60 desibell
we as humans