Physics Mastery Lab

-“The wavelength is 0.20 s.” This is wrong because wavelength’s unit is meter and it measures the distance between two adjacent locations in the disturbance, not the time one particle takes to finish one vibration.

Sound waves are nothing more than an energy transfer through a medium be it through a liquid, solid, or a gas. Sound pressure or intensity is measured on logarithmic scale in decibels dB which increases on an order of magnitude. For instance a quiet conversation would be around 30 dB and whereas the human pain threshold would be just over 100 dB. While the pitch or frequency of the sound is measured in hertz or Hz, the higher the hertz the higher the pitch of the sound and vice versa (Hildebrand, 2004).

12. Change to pulse, fixed end with zero dampening and high tension. Send a pulse and observe what happens to the reflected wave. Sketch the pulse shape before and after the reflection with the fixed end.

"What it is telling us is the sound is located between about 7,000 kHz and 8,000 kHz. There are about 20 peaks, and they seem to be equally spaced. All these peaks correspond to a different frequency," said Kausik Sarkar, an acoustics expert and engineering professor at The George Washington University who reviewed the recording with the AP.

Sound is apart of our everyday lives. Regardless of if it's the sound of a leaking water faucet, the tapping of a pencil or even the whistling of wind, we’re surrounded by the physics of sound at all times. Sound waves come in various

An Ultrasound Technician, also known as diagnostic medical sonographers, use high-frequency sound waves to create images of soft tissue in a patient's body. Physicians use these images to diagnose abnormalities and diseases in a patient. As early as 1826, a Swiss physicist name Jean-Daniel, had effectively used an underwater bell to determine the speed of sound in the waters of Lake Geneva. In the late 1800s, physicists were working successfully towards defining the fundamental physicists of sound waves, transmission, propagation, and refraction. Lord Rayleigh was the first to describe sound waves as a mathematical equation, forming the basis of future practical work in acoustics. Lord Rayleigh famous work “the Theory of Sound” was published

It is often overlooked that the Baillie sounder worked as a system with other instruments. In addition to the sounder, several thermometers, a water collection bottle and a pressure gauge were often attached to the hemp sounding line. In this manner, the Baillie sounder worked in concert with several other instruments collecting information about the ocean floor.

HS-PS4-1. Use mathematical representations to support a claim regarding relationships among the frequency, wavelength, and speed of waves traveling in various media

Resonance In an Air Column By Tara Sabzvari Introduction The purpose of the lab “Resonance In an Air Column” was to determine the resonant lengths of an air column for a given frequency of sound by finding the local speed of sound. The experiment was focused on the resonant lengths for a fixed-free end medium as the air column was closed on one end and open in the other. In addition, waves reflect off both fixed and open ends of a medium, in this case an air column. Furthermore, resonance is the condition in which the frequency of a wave equals the resonant frequency of the wave’s medium, which is one of the objectives of this lab.

This paper demonstrates the existence of standing sound waves and superpositional wave interference in single-side open tubes through measurement using a microphone. Relations used in modeling are given and referenced consistently throughout the paper. The measurement data supports the conclusion in a clear manner.

at octave frequencies between 250 Hz and 4 kHz) was carried out and an average pure-tone

This is 21m/s below the accepted value of speed in air at 0 ℃. At 24.4 ℃ the accepted value is 345m/s, 35m/s faster than the experimental value. Assuming that the speed of sound at any temperature can be measured from a simple calculation, this experiment can be used to measure the frequency of an unmarked tuning fork. By completing the experiment in the exact same process one can determine the wavelength.

The principle of sonic logging involves a transmitter and a receiver wherein a signal is sent from the transmitter and the amount of time taken until it has reached the receiver is recorded. The speed of sound in the subsurface depends on the elastic properties of the rock matrix, the porosity of the formations, fluid content and pressure of the formation (Petroleum Transactions, Members AIME 1958). Sonic logging is carried out after the well has been drilled.

22,050 kHz. Recall each time Matlab is run this is equivalent to a different experiment

p1 ( π × (0.8) 3 ) = (1.01 × 10 5 Pa )( π × (1.0) 3 )