A unit-amplitude pulse with duration of one second serves as the input to an RC-circuit having transfer function
How would you categorize this transfer function:
lowpass, highpass, bandpass, other?
Find a circuit that corresponds to this transfer function.
Find an expression for the filter's output.
Reverberation
Reverberation corresponds to adding to a signal its
delayed version.
Assuming
represents the delay, what is the input-output
relation for a reverberation system? Is the systemlinear and time-invariant? If so, find the transfer
function; if not, what linearity or time-invariancecriterion does reverberation violate.
A music group known as the ROwls is having trouble
selling its recordings. The record company'sengineer gets the idea of applying different delay
to the low and high frequencies and adding theresult to create a new musical effect. Thus, the
ROwls' audio would be separated into two parts (oneless than the frequency
,
the other greater than
),
these would be delayed by
and
respectively, and the resulting signals added. Drawa block diagram for this new audio processing
system, showing its various components.
How does the magnitude of the system's transfer
function depend on the two delays?
Echoes in telephone systems
A frequently encountered problem in telephones is echo.
Here, because of acoustic coupling between the ear pieceand microphone in the handset, what you hear is also
sent to the person talking. That person thus not onlyhears you, but also hears her own speech delayed
(because of propagation delay over the telephonenetwork) and attenuated (the acoustic coupling gain is
less than one). Furthermore, the same problem appliesto you as well: The acoustic coupling occurs in her
handset as well as yours.
Develop a block diagram that describes this
situation.
Find the transfer function between your voice and
what the listener hears.
Each telephone contains a system for reducing echoes
using electrical means. What simple system couldnull the echoes?
Effective drug delivery
In most patients, it takes time for the concentration of an administered drug to achieve a constant level in the blood stream.
Typically, if the drug concentration in the patient's intravenous line is
, the concentration in the patient's blood stream is
.
Assuming the relationship between drug concentration in the patient's drug and the delivered concentration can be described as a linear, time-invariant system, what is the transfer function?
Sometimes, the drug delivery system goes awry and delivers drugs with little control.
What would the patient's drug concentration be if the delivered concentration were a ramp?More precisely, if it were
?
A clever doctor wants to have the flexibility to slow down or speed up the patient's drug concentration.
In other words, the concentration is to be
, with
bigger or smaller than
.
How should the delivered drug concentration signal be changed to achieve this concentration profile?
Astronomy (from Ancient Greek ἀστρονομία (astronomía) 'science that studies the laws of the stars') is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution.
Rafael
vjuvu
Elgoog
what is big bang theory?
Rosemary
what type of activity astronomer do?
Rosemary
No
Richard
the big bang theory is a theory which states that all matter was compressed together in one place the matter got so unstable it exploded releasing All its contents in the form of hydrogen
according to the theory of astronomers why the moon is always appear in an elliptical orbit?
Gatjuol
hi !!! I am new in astronomy....
I have so many questions in mind ....
all of scientists of the word they just give opinion only.
but they never think true or false ...
i respect all of them...
I believes whole universe depending
on true ...থিউরি
Govinda
hello
Jackson
hi
Elyana
we're all stars and galaxies a part of sun. how can science prove thx with respect old ancient times picture or books..or anything with respect to present time .but we r a part of that universe
there many theory to born universe but what is the reality of big bang theory to born universe
Asmit
what is the exact value of π?
Nagalakshmi
by big bang
universal
there are many theories regarding this it's on you believe any theory that you think is true ex. eternal inflation theory, oscillation model theory, multiple universe theory the big bang theory etc.
Aarya
I think after Big Bang!
Michele
from where on earth could u observe all the stars during the during the course of an year
is that so. the question was in the end of this chapter
Karuna
in theory, you could see them all from the equator (though over the course of a year, not at pne time). stars are measured in "declination", which is how far N or S of the equator (90* to -90*). Polaris is the North star, and is ALMOST 90* (+89*).
So it would just barely creep over the horizon.
Christopher
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