Q1. What is the relationship between period and frequency?
Period refers to the amount of time needed to complete 1 cycle and is expressed in seconds. Frequency is the number of cycles per second and is measured in Hertz(Hz) , or the rate of change with respect to time.
Period and frequency are the inverse of each other, the mathematical representation of the relation is:
Frequency = 1/T (period)
Period = 1/F (frequency)
Example:
The period of a single cycle is 0.1 seconds, so to find the frequency using the formula you divide 1 by 0.1, which would give you 10, so the frequency would be 10Hz.
And if you divide 1 by 10(frequency), it would give you 0.1(period)
Thus it takes 0.1 seconds to complete a single cycle and there are 10 complete cycles
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What does the amplitude of a signal measure? What does the frequency of a signal measure? What does the phase of signal measure?
Amplitude: Value of the signal at any given point.
Frequency: Is described as the number of periods in one second but is a measurement of the rate of change of a signal with respect to time
Phase: The position of the waveform relative to time zero(0), phase is measured in degrees or radians.
Q3-How can a composite signal be decomposed into its individual frequencies?
A composite signal can be periodic or non-periodic, the Fourier analysis states that a composite signal can be decomposed into its individual frequencies by using frequency-domain graphs.
•If the composite signal is periodic, the decomposition will result in discrete frequencies.
•If the composite signal is non-periodic, the signal can be decomposed into an infinite number of simple sine waves with continuous
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Wavelength can be calculated with the following formula:
Wavelength = propagation speed * period = propagation/frequency
However optical signals have shorter wavelengths because the cables decrease the propagation speed (speed of light). Q10- Can we say a signal is periodic or non-periodic by just looking at its frequency domain plot? How?
Yes, the frequency domain plot of a non-periodic signal will show us continuous values, while the frequency domain plot of a periodic signal will show discrete values.
Q11-Is the frequency domain plot of a voice signal discrete or continuous?
Normally a voice signal is non-periodic so this would mean the frequency domain plot would be continuous.
Q12-Is the frequency domain plot of an alarm system discrete or continuous?
An alarm system is the opposite of a voice signal and is normally periodic which would mean the frequency domain plot would be discrete.
Q13-We send a voice signal from a microphone to a recorder. Is this base-band or broad-band transmission?
Broad-band transmission, modulation is
An oscilloscope is a laboratory instrument that commonly used to display and analyze the waveform of electronic signals. This device draws a graph of signal voltage as a function of time. Oscilloscope usually have two-dimensional graph which electrical potential differences represent by Y-axis (vertical) and time represent by X-axis (horizontal). With positive values going upward and negative values going downward (Ask.com, 2014). In any oscilloscope, the horizontal sweep is measured in seconds per division (s/div), milliseconds per division (ms/div), microseconds per division (s/div), or nanoseconds per division (ns/div). The vertical deflection is measured in volts per division (V/div), millivolts per division (mV/div), or microvolts per division (µV/div).
after day, month after month, year after year. These are all examples of what is called a cycle; a series of
State: The cardiac cycle is composed of five stages which each trigger the relaxation or contraction of the atria or ventricles and direction of blood flow.
Frequency and wavelength are related to one another because frequency describes the number of waves that of which passes by a point during one second. Wavelength is related on accounts to the distance from a peak of one wave to the peak of
Physical science is the study of non-living matter which I will be talking about the physics of music, and how pitch and frequency play a role together in science. Physics is known to be the most fundamental science, based on the principle and concepts. It deals with matter, motion, force, and energy, (Shipman-Wilson Higgins, 2013). In this report I will be dealing with pitch, frequency sound and waves which are also dealing with physical science and how they our related.
The Periodic Table of Elements is a table that arranges all known chemical elements by order of their atomic numbers. During the 1600s, vast amounts of knowledge about the properties of elements and their compounds were discovered and by 1869 63 elements had been discovered. As more and more elements were discovered, scientists began to recognise similarities between their properties and began to devise means of classification. Thus the periodic table of elements was created. The current periodic table contains 117 elements, however more may yet be discovered. The elements in the periodic table are classified in groups, periods and blocks. Groups refer to elements with similar properties and are the vertical columns of the table. The periods are the horizontal rows and illustrate the number of valence electrons each element has (how many electrons are in the outer shell of the element). The position an element is in on the table allows a scientist to easily judge its properties, its reactivity and its similarities to other elements.
A discrete time stochastic process which is described as a sequence of random variables known as time series (Markov chain). The values of variables change at the fixed points of the time.
Temporal pattern- This is a defined segment of signals that recur frequently in a temporal signal sequence. Temporal signal sequences could be the movements of head, hand, body or a piece of music etc. Patterns involving body movements represent the habit of a person.
Nature of wave: It is an electromagnetic wave as it does not necessarily require a medium for p...
The dominant frequency in the EEG pattern determines what shall be called the current state of the brain. If the amplitude of the alpha range frequencies is highest, then the brain is said to be in the alpha stage. Note, that other frequencies still exist and it is impossible to give any "exact frequency your brain is operating on". However, later references to the brain states use the simplification of assuming that such a single frequency exists.
The horizontal row of the periodic table is called a period. In the whole table, there are seven rows or periods and they begin at the far left. A new period begins when electrons begin filling a new principal energy level. With the groups and periods, it makes the table fit well together.
waves are further divided into two groups or bands such as very low frequency (
Trigonometry defines the trigonometric functions, which describe those relationships and have applicability to cyclicalphenomena, such as waves. The field evolved during the third century BC as a branch of geometry used extensively for astronomical studies.[2] It is also the foundation of the practical art of surveying.
"Properties of sine waves." University of Manitoba. University of Manitoba, 2010. Web. 29 Nov. 2013. .