Sound's influence on brain chemistry

  On 5/9/2018 at 4:44 AM, thawkins said:

Yeah. My point is that after you calculate the average you have no way of going back to the original - i.e. if the average is 50, it may have been between 25 and 75 or 49 and 51. And in the case of the equal loudness contours: maybe the data shows that for bass frequencies, most people have similar perception; for mids some people hear them way better than others, etc.

 

I think though that if there were any significant differences, someone would have published a lot of articles about this.

  On 5/9/2018 at 11:33 AM, THIS IS MICHAEL JACKSON said:

 

  On 5/9/2018 at 4:44 AM, thawkins said:

Yeah. My point is that after you calculate the average you have no way of going back to the original - i.e. if the average is 50, it may have been between 25 and 75 or 49 and 51. And in the case of the equal loudness contours: maybe the data shows that for bass frequencies, most people have similar perception; for mids some people hear them way better than others, etc.

 

I think though that if there were any significant differences, someone would have published a lot of articles about this.

yeah i feel ya, dunno if that data is out there though...

 

If they have data to get the average, they must have the data to calculate the standard deviation. I think it should just be a measure of how much does the actual data differ from the calculated average, although the official definition seems to be more complex.

It's weird - usually in science if they measure something, they also give the margin of error. In the case of Fletcher-Munson, there's nothing like that I have seen, so I got curious.

  On 5/8/2018 at 6:42 AM, thawkins said:

So has anyone ever measure how much the curves differ person to person? Having a standard deviation would answer that question pretty well...

  On 5/8/2018 at 12:26 PM, THIS IS MICHAEL JACKSON said:

well i believe that to get an average measure one must have the difference measures, no?

  On 5/10/2018 at 4:09 AM, thawkins said:

Yeah. My point is that after you calculate the average you have no way of going back to the original

  On 5/9/2018 at 11:33 AM, THIS IS MICHAEL JACKSON said:

yeah i feel ya, dunno if that data is out there though...

  On 5/10/2018 at 4:09 AM, thawkins said:

If they have data to get the average, they must have the data to calculate the standard deviation.

i feel like we're going around in circles lol :^D

Yyep. :)

  On 5/8/2018 at 6:42 AM, thawkins said:

So has anyone ever measure how much the curves differ person to person

bell curves are nice SOMETIMES. People forget the bell curve is a curve too

done