Marco Polo

The Objective : To determine if when the time delay and volume of sound reaching the ears is changed, then the perception of the source of the sound will change.

Methods/Materials

Two microphones were set 10 cm apart on anechoic foam.

In test A, a beeping sound was played every fifteen degrees on a semicircle with a one foot radius around the mics.

In test B, the beeps were played every six inches in a direct line from the mics.

The recorded sound waves were converted into graphs on a computer, which compared the left mic to the right mic.

Results

The amplitude and time delay differed when the origin of the sound changed.Test A supported that time delay can be used reliably to perceive the direction of a sound's source.

However, test B did not support volume as a directional source clue because there was no pattern to which mic had a greater amplitude.

Conclusions/Discussion

Sound perception (on headphones exclusively) can be accurately manipulated in a few steps:
1.Make an exact copy of the track (track A and track B)
2.Decide what direction you want the sound to come from
3.Find the appropriate time delay
4.Play track A in one ear, wait the time delay, then play track B in the other.

This project is a study of how sound is perceived and how to accurately manipulate its perception.

Science Fair Project done By Aley Barnum

 

 

<<Back To Topics Page...................................................................................>>Next Topic

Related Projects : Is the C or Assembly Programming Language Better , Longevity and Diet , Marco Polo , Mathematical Approaches to a Neat Problem , Maximum Angle of Attack Before Stalling , MgCl(2) Stimulating Effect on Osteogenesis , Motion Detection Algorithm , Multi-Drug Resistance and the Mechanism of Orlistat-Induced Cell Death , Nanocrystalline Dye-Sensitized Solar Energy II , Natural Human Interface for Technology , Now You See It, Now You Don't , Number Theory Meets Algebra , Optimization of the Water Flow Rate in a Clean Energy Electrostatic Power Generator , Optimizing the Chicken Soup Can , Optimizing the Efficiency of Home Hydropower

 

 

 

Copyright © www.sciencefairexperiments.org 2012 through 2016

Designed & Developed by Big Brothers