Nt1310 Unit 1 Lab Report

In that case, there must be no systematic effect due the monochromatic $\gamma$ selection criterion.

One of the main problems you do not want in a lab is a contamination issue, especially when a test is time sensitive. This situation came up when we received and analyzed the results of one of our major and most extensive tests. At the time, the lab was low staffed and I was the most familiar with the test. I believed I was sufficiently experienced with time management and knowledge that I could successfully determine the root of the contamination in tandem with completing current tasks assigned. I evaluated all possible angles of the test and realized that there were multiple factors and various opportunities that could have caused this to happen. I decided to channel most of my energy towards braking down the steps/phases and examined any

“The vibrations of the tuning forks as they are passed over and around the body become carrier waves— specific sounds—that attract accumulated, disruptive energy patterns stored in the body,” she says.

With the lowest frequency tuning fork in hand, strike the tuning fork with a rubber mallet. Add or subtract

Resonance, which is produced by oscillating air, is a “phenomenon that occurs when the frequency of a vibration forced on an object matches the object’s natural frequency and a dramatic increase in amplitude occurs” (Hewitt 521). Resonance causes the tubes of varying lengths to produce different pitches. Tubes used in musical instruments are either open at one end, or open at both (excluding the rain stick), which allows for nodes and antinodes to form within the tube. Nodes are “pivot” points on

of the case, as does the keyboard, which sits off center to one end or the other. At the opposite end of this rectangle is the soundboard. The soundboard is a box taking up one quarter of the total length of the instrument. It is usually made of softwood with an “f” shaped hole cut in it to amplify the sound coming from the strings, which are situated just above it. The keys sit on a simple rocker mechanism and strike the strings with brass blades called tangents. Under normal circumstances the strings are deadened by felt dampers lying very near to on end of the strings. As the key is depressed it strikes the string just past the felt damper and creates a temporary bridge for that string allowing it to vibrate. For the note to continue to vibrate the player must keep the key depressed. Also, due to the nature of the mechanism on the clavichord it is possible for the player to create vibrato by varying the amount of pressure put on a key once it has been depressed. Unfortunately due to the size and construction of the clavichord it has an extremely soft sound making it impossible to be heard in noisy surroundings.

Vibrations are undesirable for structures, due to the need for structural stability, position control, durability, performance, and noise reduction. Vibrations are concern to large structures such as aircraft and small structures such as electronics.

As the deflection stiffness of the ribs increase the buckling pattern changes forming more than one half sine waves over the length of the box as shown in the next figure

This is the method which is used to set up the differential equation of the motion of a string known as a ‘’wave equation ‘’this was first developed by D’Alembert in 1750. In contrast to this, the vibration of the thin beams that are supported and clamped in was studied by Euler in 1744 and Daniel Bernoulli in 1751 their theory is known as the Euler-Bernoulli or thin beam theory. Just like in 1882 where Hertz also introduce the first successful theory of impact (Rao, S. S. 2004).

Since our turning device developed from this project should be compatible with all types of electric guitar, my specific contributions to the project deals with system design, experimental analysis and problem solving. I come up with the hardware design. Like we said before, there are other devices out there such as Tropical Tune’s Self Tuning system, so the signal processing part of our design has proven durable. The problem we encounter the most is the one deals with actual hardware, in this case the displacement of six tuning pegs of the different kind of guitars. The copper wire design that allows for multiple-string tuning and is lightweight, which makes this a convenient, easy to carry tuning device. The

9 icantly reduce tether loss in micromechanical resonators to a point where the total energy loss is

This can be accomplished only through complex computer simulations, which uses three acoustic modulations to hold a levitating object in midair. These acoustic modulations can even be programmed to twirl and move levitating objects, or simply form a high-pressure bubble that holds the object stationary. Some acoustic simulations require the levitating object to be encased on all four sides by loudspeaker arrays to improve maneuverability. The actual loudspeaker relies on a series of long and short wavelengths, of which are generated at 40 kilohertz, at 140-150 decibels. Because this device runs at 40 kilohertz, the sound frequency is well above amicable human hearing, but is detectable to dogs. When the inaudible wavelengths create a pocket of low pressure, they can counteract the gravitational force of a polystyrene ball 5mm in circumference. Allow its rather paltry ability to levitate only light-weight material averts this technology from being applied as a tractor beams, medical scientists are exuberant about the fact that they can modify it to activate acoustic medication and manipulate individual

Deflection of an Eccentric Tie Student Name Soh Zheng Pei 0303341 Group Members Toh Khai Liang Fong Woei jiunn Lee Deng Cherrng Date of Experiment: | Report due date: | Report submission date: | Checked by: | Item/marks | | Format/10 | | Abstract and Introduction/10 | | Figures and Diagrams/15 | | Materials and Method/10 | | Results Discussions/45 | | References/10 | |

The Gyroscope developed at GIKI is a thermally actuated 3-DoF micro-machined gyroscope utilizing Chevron thermal actuators to drive proof mass. There are a number of actuation mechanisms which include electrostatic, piezoelectric, thermal etc. The benefits of this design will be described later.

With the advancement in science and technology we are now seeing many new and improved applications of Nanoelectromechanical systems in various field. With the decrease in the size of many mechanical devices in terms of thickness and mass, we have been able to achieve an increased resonant frequency and low force constants. The sizes of NEMs devices vary between a few nanometers to a few hundred nanometers depending upon the application of the device. The prevalence sophisticated fabrication technologies has led to the decrease in the size of devices. NEMs devices find a wide range of applications as sensors, displays, for data storage and in medicine.