# 2.2 Labview implementation of 2d array delay and sum beamformer  (Page 3/3)

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The second part of the code uses the angles mentioned above to calculate the delay values, although again due to the regular nature of our array, it is possible to calculate only two of the delays outright and extrapolate the rest of the delays from those two. (Which is indeed what we have done in an effort to reduce calculations and make the algorithm more efficient.)

The final part of the code, not shown in the code above but which can be seen in the function node in the figure below, involves the recipropcal of those first two lines; that is, rescaling all the 'd' values found to 'k' values that can actually be used when shifting the signals prior to adding them together.

## Main analysis vi

This is our top-end module, where all the modules mentioned in the previous section are brought together in the same vi and linked together in the proper ways so as to create a working project.

First, not unexpectedly, there is a call to the Waveform Generation VI , which provides us with our collected and upsampled signals. From that sub-VI, the signals from microphones 1, 2, and 4 are taken, microphones 1 and 2 passed to one for loop and 1 and 4 passed to the other. Within the for loop, as mentioned before, one signal is shifted relative to the other, and the norm taken, for all delay values possible. The result of this is concatenated into an array, the maximum norm found, and from the location of the maximum norm, the value of the delay, or as close as we can get with the sampling resolution we have.

These shift values (the integer index corresponding to as close as we can get to the ideal time delay) are passed to the Delay Generation VI , which then returns an array of values. The theta and pi values function as outputs to the front panel, and then the delay (shift) values are used to set the necessary shift for their corresponding microphone. Finally, the shifted output arrays are all summed (using a for loop, as a point by point summing module also seemed to be among those useful things not premade in Labview 5.1), and the output of the for loop, the array that is the sum of all the previous ones, is then attached to a waveform graph, also on the front panel.

Phi is measured such that straight up is at zero, along the xy plane at 90 degrees. Theta is measured with the "bottom" of the array (although it can of course be reoriented as the user pleases), that is, the negative y direction, as zero degrees. The signs of the angles indicate the direction of propagation of the wave, and are thus opposite to conventional intuition, and the sign of phi is, of course, impossible to determine with any degree of accuracy due to the up-down ambiguity inherent in a two-dimensional array.

Success! (For a deeper exploration of our results, please continue to the results module

## Labview code

can someone help me with some logarithmic and exponential equations.
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
a perfect square v²+2v+_
kkk nice
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
rolling four fair dice and getting an even number an all four dice
Kristine 2*2*2=8
Differences Between Laspeyres and Paasche Indices
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
is it 3×y ?
J, combine like terms 7x-4y
im not good at math so would this help me
yes
Asali
I'm not good at math so would you help me
Samantha
what is the problem that i will help you to self with?
Asali
how do you translate this in Algebraic Expressions
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
what's the easiest and fastest way to the synthesize AgNP?
China
Cied
types of nano material
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
what is nanomaterials​ and their applications of sensors.
what is nano technology
what is system testing?
preparation of nanomaterial
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
what is system testing
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
how did you get the value of 2000N.What calculations are needed to arrive at it
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