The Logic Off Topic list

Hi ya EVERY BODY.

The equipment has been set up to compare the physical interactions of two 
sound waves at different freq.: Two generators (A+B) are fed to both an 
oscilloscope and a loud speaker via switch box enabling each to be viewed and 
heard either separately or combined.


AMPLIFIER OSCILLOSCOPE             A         B
      [     [ [                       \   /
      [     [ [_____________[    ] wall
      [ [_________________________________[     ]  (suppose to be box)
      [__________________________//
                                                    //
( I tried to above to draw a diagram, to see if it would help any one better 
- I know not very good, but at least I tried) WEEEEE! Don't give up my 
studies for Art drawing HE HE

DOES ANY ONE KNOW HOW TO WORK OUT THE CALCULATIONS FOR:

The period output A as shown on the Oscillator is: 10 ms (milli seconds or 
metres per seconds)?

The period output B as shown on Oscillator is: 0.1ms

I need to calculate the output freq. for each tone generator and the 
resultant waveform of each sound wave at room temp?

0.1 ms I think is 0.010s?  I know anything with nought on left from decimal 
point. Oh I'm getting confused. Does any one know how to do this calculation? 
If so can you explain it to me.

I am awaiting fro books to come through from book stores and libraries, but 
need to do this formula by Wednesday.

Hope u can help any one.

Oh by the way, I hope you have all had a good day and have a good day Tuesday.

Love

Debbie debs xxx


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DbbBrook@... wrote:

>Hi ya EVERY BODY.
>
>The equipment has been set up to compare the physical interactions of two
>sound waves at different freq.: Two generators (A+B) are fed to both an
>oscilloscope and a loud speaker via switch box enabling each to be viewed and
>heard either separately or combined.
>
>
>AMPLIFIER OSCILLOSCOPE             A         B
>      [     [ [                       \   /
>      [     [ [_____________[    ] wall
>      [ [_________________________________[     ]  (suppose to be box)
>      [__________________________//
>                                                    //
>( I tried to above to draw a diagram, to see if it would help any one better
>- I know not very good, but at least I tried) WEEEEE! Don't give up my
>studies for Art drawing HE HE
>
>DOES ANY ONE KNOW HOW TO WORK OUT THE CALCULATIONS FOR:
>
>The period output A as shown on the Oscillator is: 10 ms (milli seconds or
>metres per seconds)?
>
>The period output B as shown on Oscillator is: 0.1ms
>
>I need to calculate the output freq. for each tone generator and the
>resultant waveform of each sound wave at room temp?

Output frquency in Hertz is the inverse of the period in Seconds.
F= 1/period,  if period is 0.1 ms then F=1/0.0001 = 10,000 Hz or 10 KHz

I can only imagine that you need to graph the pressure wave if you are
considering room temperature. I believe the velocity of sound is approx
320 Metres per second  at 20 degrees C (no idea in imperial) in air.
You may need to find a more accurate figure. In any case, Wavelength in
Metres is equal to velocity/period.

>0.1 ms I think is 0.010s?  I know anything with nought on left from decimal
>point. Oh I'm getting confused. Does any one know how to do this calculation?
>If so can you explain it to me.

1 millisecond (mS) is one thousandth of a second or 0.001 seconds
>
>I am awaiting fro books to come through from book stores and libraries, but
>need to do this formula by Wednesday.

Hope I'm not helping you with your physics homework ;)

S.

Oops sorry...

Wavelength in Metres is equal to velocity*period.
not velocity/period as I said in previous post...

At 11:06 PM 9/10/01 +1000, you wrote:
>DbbBrook@... wrote:
>
>>Hi ya EVERY BODY.
>>
>>The equipment has been set up to compare the physical interactions of two
>>sound waves at different freq.: Two generators (A+B) are fed to both an
>>oscilloscope and a loud speaker via switch box enabling each to be viewed and
>>heard either separately or combined.
>>
>>
>>AMPLIFIER OSCILLOSCOPE             A         B
>>      [     [ [                       \   /
>>      [     [ [_____________[    ] wall
>>      [ [_________________________________[     ]  (suppose to be box)
>>      [__________________________//
>>                                                    //
>>( I tried to above to draw a diagram, to see if it would help any one better
>>- I know not very good, but at least I tried) WEEEEE! Don't give up my
>>studies for Art drawing HE HE
>>
>>DOES ANY ONE KNOW HOW TO WORK OUT THE CALCULATIONS FOR:
>>
>>The period output A as shown on the Oscillator is: 10 ms (milli seconds or
>>metres per seconds)?
>>
>>The period output B as shown on Oscillator is: 0.1ms
>>
>>I need to calculate the output freq. for each tone generator and the
>>resultant waveform of each sound wave at room temp?
>
>Output frquency in Hertz is the inverse of the period in Seconds.
>F= 1/period,  if period is 0.1 ms then F=1/0.0001 = 10,000 Hz or 10 KHz
>
>I can only imagine that you need to graph the pressure wave if you are
>considering room temperature. I believe the velocity of sound is approx
>320 Metres per second  at 20 degrees C (no idea in imperial) in air.
>You may need to find a more accurate figure. In any case, Wavelength in
>Metres is equal to velocity/period.

I think you'll find that  340 m/sec is closer to the mark which is roughly
1100 feet per second. 

Just divide those disances (340M or 1100 feet) by the frequency to get the
wavelength of an audio wave of frequency (f). 

Frequency = 1/period

>0.1 ms I think is 0.010s?  I know anything with nought on left from decimal 
>point. Oh I'm getting confused. Does any one know how to do this calculation? 
>If so can you explain it to me.

No. 1 ms = 1 millisec which is one thousandth of a second = 0.001 second 

So 0.1 msec is 0.0001 second.

Regards,
Murray

Thank you Murray,

This is a very hard subject. Doing a Fast Track course on HNC Music 
Technology. Every thing is going fast. Two days a week 10am - 9pm.  But i 
will get there, with every ones help including yours.

Have a lovely week, Hopefully I can help any one out there with some advice 
someday. If i can't answer it, I will get some advice of other people.

Thank you once again Murray.

Love

Debbie x


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At 11:28 AM 15/10/01 -0400, you wrote:
>Hi Murray
>If this is No. 1 ms = 1 millisec which is one thousandth of a second = 0.001 
>second 
>what is 10ms is that 0.010?

Yep.

Hi Murray
If this is No. 1 ms = 1 millisec which is one thousandth of a second = 0.001 
second 
what is 10ms is that 0.010?

love

debbie



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Thank you Murray.  This acoustics is doing my head in. All family problems 
going on and I find it very hard to think at moment. So thank you.

Love

Debbie x


[Non-text portions of this message have been removed]

Debbie Brooks wrote:
>This acoustics is doing my head in.
It can do that. All that stuff going in one, straight through, and out the 
other.

>All family problems
>going on and I find it very hard to think at moment.
Sorry to hear about that.
Some of us (me, particularly) are a bit nuts, actually, but if it helps 
then think of us (especially us nutty ones) as your new family.
Don't think about it too hard.
Does that make your life better?
Do hope so.

Kool Musick
Keep Musick Kool


_________________________________________________________
Do You Yahoo!?
Get your free @... address at http://mail.yahoo.com

Calculate out freq. of each tone generator and the resultant wavelength of 
each sound wave at room temp.

A is 10ms
B is 0.1ms

No. 1 ms = 1 millisec which is one thousandth of a second = 0.001 second 
and 10ms is 0.010ms how do i do the rest.

Sorry had bad weekend with dad and had to move out and every thing, and i 
just can't seem to think.

c = sound  f = freq. /\ = wavelength

a)   Calculate the output freq.and wavelength for each one. 10ms = 0.010ms f 
= 1/t = 1 divided by 0.010 = 100Hz

b)  0.1ms = 0.001ms f = 1/t = 1 divided by 0.001ms = 100hz

Is this right Murray?

The question was two generators a + b are fed to both an oscilloscope and a 
loudspeaker via a switch box enabling each to be viewed and heard either 
separately or combined.

period of output a is 10ms

period of output b is 0.1ms

Calculate the output freq. for each tone generator and the resultant 
wavelength of each sound wave at room temp.

 





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Thank you Kool.

Nice reply.   I try not to think but you know us woman.  Just what to get on 
studying but people especially family drive me mad. 

Thank you 

lOVE

DEBBIE X


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Hi to my New family

The Nutty ones.  

I have two nasty brothers (one did things he shouldn't have) one nasty 
drunken and violent dad and my mum is disabled but sticks by dad.

Move out and then have to move back because of Mum, then it starts all over 
again. AHHHHHHHHHH

i think i am going to just study and study.

Just look forward and keep focused and keep smiling. We will all get there in 
the end if we just keep focused.  It's hard some times but we all can do it. 


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Hi Debbie,

<Oprah Winfrey Mode On>
<Sickening Psychological Therapeutics Mode On>
<Maybe Good Idea To Hit Delete Button Right Now Mode On>

>Thank you Kool.
You're welcome.

>Nice reply.
Gosh. Thank you. Been a while since anyone on this list said that to me!!

>I try not to think but you know us woman.
We live in strange times, so best if I not to say anything to that, OK!!

>Just what to get on studying
Then study.

>but people especially family drive me mad.
It's difficult to do (just look at some of the messages going back on forth 
on this very list!!!) ... but ...
Don't let them make you mad.
Take deep breaths.
Keep calm.
If and when you let them make you mad then they have already won.

>Thank you
You're welcome


<Maybe Good Idea To Hit Delete Button Right Now Mode Off>
<Sickening Psychological Therapeutics Mode Off>
<Oprah Winfrey Mode Off>

Kool Musick
Keep Musick Kool


_________________________________________________________
Do You Yahoo!?
Get your free @... address at http://mail.yahoo.com

Your right kool.

If i think like this they have all won. well we can't let that happen can we. 
 NO!!

So i'm gonna have a nice cup of tea and take deep breathes and think 
positive.  It's nice to have someone to talk to.  Thank you.  Deep breathing 
is what i'm doing. Now i'm smiling.

Not gonna go mad. Their not winning.  Just relax and unwind for a while.  I 
can bet them. Thank you once again.

Love

Debbie


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Oprah winfrey is really good. I use to watch her shows and they use to work 
for me any way.

Well think i better start watching again. HA HEHE

Have a lovely week Kool.




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At 12:03 PM 15/10/01 -0400, Debbie wrote:

>Calculate out freq. of each tone generator and the resultant wavelength of 
>each sound wave at room temp.
>
>A is 10ms
>B is 0.1ms
>
>No. 1 ms = 1 millisec which is one thousandth of a second = 0.001 second 
>and 10ms is 0.010ms how do i do the rest.
>
>Sorry had bad weekend with dad and had to move out and every thing, and i 
>just can't seem to think.

Sorry to hear you're having a rough time Debbie. Hope things work out for
you and soon.


>c = sound  f = freq. /\ = wavelength
>
>a)   Calculate the output freq.and wavelength for each one. 10ms = 0.010ms f 
>= 1/t = 1 divided by 0.010 = 100Hz
>
>b)  0.1ms = 0.001ms f = 1/t = 1 divided by 0.001ms = 100hz
>
>Is this right Murray?

0.1 ms is one ten-thousandth of a second 

f = 1/t = 10,000 Hz or 10kHz for the wave with a period of 0.1 second

>The question was two generators a + b are fed to both an oscilloscope and a 
>loudspeaker via a switch box enabling each to be viewed and heard either 
>separately or combined.
>
>period of output a is 10ms
>
>period of output b is 0.1ms
>
>Calculate the output freq. for each tone generator and the resultant 
>wavelength of each sound wave at room temp.

OK -- well you already know the two frequencies 100hz and 10kHz.

Wavelength = velocity/frequency

using your symbols from above that can be expressed

^= c/f

c = speed of sound = 340 metres/second

so for 100Hz wave

^ = 340/100 = 3.4 metres

For 10kHz wave

^= 340/10,000 = 0.34 metres

BTW I actually did these calculations in the email I sent last week  --
might be worth another look. I went on to talk about the different
properties of these two waves.

Hope this helps a little,
Murray

BTW Debbie -- there was a typo I missed in that mail from last week

At the end it read:

>So in the case of two sound waves -- one at 100 Hz and another at 110 Hz -- 
>being added together the cycle of reinforcment and cancellation will have a 
>frequecy of 110 -110 = 10 Hz and will be perceived as and audible beat of 10 
>Hz.

Should have been 110 - 100 = 10Hz in the last line. Sorry 'bout that.

Regards,
Murray

Thank you Murray.

I had problems with pc and internet and all my emails went.

Thank you, you are a very nice man for keep helping me. Sorry to keep 
bothering you.

Have a nice night.

Love

Debbie x


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At 01:21 PM 15/10/01 -0400, you wrote:
>Thank you Murray.
>
>I had problems with pc and internet and all my emails went.
>
>Thank you, you are a very nice man for keep helping me. Sorry to keep 
>bothering you.

No bother. ;-)

I just sent my mail from last week to you direct off the list.

Regards,
M