{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lab 12

# Lab 12 - Lab Performed December 4th 2007 Lab Due December...

This preview shows pages 1–2. Sign up to view the full content.

Lab Performed: December 4 th , 2007 Lab Due: December 11 th , 2007 Lab 12 Section 13 Objective: The objective of this lab is to investigate standing sound waves in a sound tube. The sound waves will be recorded by a microphone in a resonance tube along with reflected pulses to record the speed of sound. Description: We will be playing sounds through a resonating tube and record the sounds through a microphone that is inserted into the resonance tube. Theory: Air is made up of 80% N 2 and 20% O 2 gases and gases in a cylinder act like a spring and its mass can support oscillations and waves. When the cone of a loud speaker moves out, it compresses the air next to it and also imparts an outward velocity to the air molecules. Those air molecules nearest the speaker collide with adjacent air molecules and impart to those molecules their motion. Sound is produced as compression propagates away from the speaker. If the speaker cone is vibrated sinusoidally, a propagating sinusoidal sound wave or a traveling wave moves out from the speaker. which is v f = λ (where λ is the wavelength, f is the frequency, and v is the wave speed), is satisfied by this wave. As motion moves along the direction in which the wave propagates, the waves are called longitudinal waves. In the traveling sound waves, the displacement of the air particles satisfies the wave equation. The velocity of the waves, v , is given by: ρ γ p v = ) 1 ( Where p is the air pressure and ρ is the air mass density. The quantity γ is the ratio of

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern