Experiment 2 was signal analysis. Part 1 of this experiment we used the FFTDEMO machine to artificially generate time and frequency domain plots. Next in part 2, a software called SCOPE was used to record digital samples of the analog signals that was also generated by the signal generator. In Part 3, we used a phone to generate different sound waves by pressing on different numbers. The last part, Part 4 SCOPE was used again to record the sound wave of a small hammer striking an aluminum rod. Some of the more important results that was recorded is the frequency of the telephone tones. There was only seven frequency for every number on the phone. Also the Nyquist sampling data that was recorded from the experiment was really close to the …show more content…
The amplitude that was recorded was relatively similar to each other which is a good thing because it is the same waveform harmonics Just different positions in the amplitude of each sampling frequency. The change in time that was recorded all happened to be the same which was 0.00488 seconds. That means the frequency had the same change in time in-between the peaks. Another similarity in the first three cases is 204.918 hertz in the time domain. Which makes sense because stated above in equation 1 it is one over the change in time. Since each change in time is the same that means frequency had to also be the same. In the frequency domain, the resolution for case 1 is one, case 2 is two, and then case 3 is eight. The results of the resolution might seem different, but it is valid because the f_s for case 3 is about four times the original f_s. The amplitude for this is also different coming in at 100, 63.79, and 78.88. However, the frequency is really similar to each other. How the values was found was by looking at the frequency domain plot, and finding the largest peak of the plot. The data makes sense because the chart followed similar to the different harmonics of the same frequency. The data that was obtained could be seen below in Table
I have to pull two alleles (two straws) from the bag to represent one fish because fishes like humans get two alleles one from their father and one from their mother.
Because it is a way of knowing the pressure that the blood is putting on the walls of arteries and veins.
Okay, if our lithium weight is going to be 6.941 g/moL Then that means we have to take 24.6g of Lithium and multiply it by 1 mol of Lithium over 6.941 g of Lithium. This would equal to be 3.544 mol of Lithium. Then we have to take that 3.544 and multiply it by 1 mol of hydrogen gas over 2 mol of lithium. Which would then equal into 1.772 mol of hydrogen gas. We can then figure out that 1.772 is our “n”. The “T” is our 301 Kelvin, the “P” is our 1.01 atm and the “R” is our 0.0820 which would be the L atm over mol k. And we can’t forget about our “V” which would be V equals nRT over P which equals 1.772 mol divided by 0.0820 L atm over mol kelvin multiplied by 301 kelvin over 1.01 atm which equals to our final answer of: 43.33 of H2
The purpose of this experiment was to determine whether if the sound is affected when it travels through different length pipes. The method used to do this experiment was created by using 5 different PVC pipes in the lengths of 10, 20, 30, 40, and 50 centimeters. Then, using a tuning fork, sound will be produced on one end of the PVC pipe and measured with a decimeter on the other end. This experiment was recorded using 5 trials for each independent level and the average decibels (dB) for each pipe length were recorded.
In 1904 Eugene Lauste successfully recorded sound onto a piece of photographic film. This invention was known as a “Sound Grate” the results where still far to crude to be used to public display.
date with the latest software and security patches. Reputable antivirus programs such as Norton Security, McAfee Antivirus, and Bitdefender Antivirus and firewall programs should be installed and kept up to date for maximum protection.
internal structures of the body and returned to the transducer. The transducer converted the returning sound into electronic signals that were processed
and sounds that this can create are put to good use to add to the
momentum transfer when air molecules collide. Our ‘subjective impression’ about the frequency of a sound is called pitch. High pitch has high vibration frequency, while low pitch has a low vibration frequency. A pure musical tone consists of a single pitch or frequency. However, most musical tones are “complex summations” of various pure frequencies - one characteristic frequency, called the fundamental, and a series of overtones or harmonics Younger people can usually hear pitches with frequencies from about 20 hertz (infrasonic) to 20,000 (ultrasonic) hertz. We can’t hear above 20,000 hertz or below 20 hertz (ultra and infrasonic waves).
The cylinder phonograph proved to be successful, but the problem with the machine was that the tin foil only allowed a few uses. With the help of another great inventor, new advances could be made to improve this invention. The inventor of the telephone, Alexander Graham Bell, had set up a laboratory for his cousin, Chichester Bell and Charles Tainter. Bell a...
There are a great number of applications for Digital Signal Processing and in order to better understand why DSP has such a large impact on multiple aspects of society, it helps to better understand the wide variety of applications it can be used for. Here we will briefly look into the following applications of Digital Signal Processing and their uses; speech and audio compression, communications, biomedical signal processing and applications in the automobile manufacturing industry. Li Tan [1] goes into detail with each of these applications in his book, Digital Signal Processing, and explains how each are used on a daily basis.
Cell phones have immensely changed the way people communicate today. A cell phone can be all a person need for interaction. From a cell phone, a person can make calls, send text messages, emails, and send and also receive directions, buy things online, do online banking, listen to music and much more. Since someone can do everything with one device, there is no longer a need to go around with multiple devices about. Greek hydraulic semaphore systems were used as early as the 4th century. The hydraulic semaphores, which functioned with water filled containers and visual signals, functioned as optical telegraphs. However, they could only apply a very limited range of pre-determined messages, and as with all such visual telegraphs could only be deployed during good visibility conditions. Experiments on communication using electricity was carried out in 1729 but was not successful. The experiment was proposed by William Fothergill Cooke. In 1837, William invented a practical electric telegraph which entered commercial use in 1838 (J. B. Calvert, May 2004). The first telephone was invented in 1878 by Alexander Graham Bell. He experimented with a ‘phonautograph’, it is a machine shaped like a pen that can draw shapes of sound waves on smoked glass by tracing vibrations.
The first experiment is the “Monster Study” it is about stuttering. This took place in 1939...
Despite the short amount of time since the introduction of the smartphone, the rapid development of the software and technology has had a tremendous effect on the everyday life of society today. The concept of communicating through a telephone was developed in the 1870s. Devices to transmit speech electrically were designed by Elisha Gray and Alexander Graham Bell, but Bell's design was patented first. On March 10, 1876, Alexander Graham Bell achieved one of his greatest successes in the making of the telephone. This brought upon a major change in communication and gave leeway to the improvement of the telephone in the days to come (Bellis, 2013b).
Sound is produced by vibrations in the air which, in this experiment, came from the hammer. The vibrations are a set of frequencies measured in units of Hertz (Hz). The faster the vibration frequency, the higher the sound will be in pitch. Pythagoras’s 2:1 ratio simply means that both tones are the same however the second tone’s frequency rate is doubled. For example, the blacksmith strike...