week1

Question 1

what is the speed of sound

Answer 1

v = sqrt(c/p)

Question 2

what is x= x + iy in polar form

Answer 2

z = rcos(theta) + ir*sin(theta)

Question 3

theta is

Answer 3

2pifreq*t+phi

Question 4

z = x + iy what is the exponential form?

Answer 4

z = re^(itheta)

Question 5

when do you use sampling?

Answer 5

to go from continuous signal to discrete

Question 6

what is nyquist frequency

Answer 6

minimal sampling frequency necessary to captur a wave. F_s ? 2* highest frequency signal

Question 7

what is aliasing?

Answer 7

when you are sampling with a requency that is a divisor of waves frequency then it will capture a wave with lower frequency instead

Question 8

what is the bit-depth of a discrete signal?

Answer 8

how precise amplitude of a continous wave is transformed to a discrete signal.

Question 9

speed of sound normal air

Answer 9

343 m/s

Question 10

wavelength formula

Answer 10

delta = v/f

Question 11

what is the helmholz formula?

Answer 11

f= (c/(2pi))*sqrt(A/(VL))
c = snelheid geluid (ander medium = andere waarde)
a = diameter uitgang
l = lengte nek
v = volume body