Title

The effect of different earbud tips on the pressure of sound transmitted

School Name

Spring Valley High School

Grade Level

10th Grade

Presentation Topic

Physics

Presentation Type

Non-Mentored

Oral Presentation Award

3rd Place

Abstract

It has been observed in multiple experiments that teenagers use earbuds to listen to amplified music, these actions can lead to symptoms caused by possible hearing loss. The purpose of this experiment was to determine which earbud shape transmits higher levels of pressure in order to better understand which earbud shape is more detrimental to a person's health. It was hypothesized that if the shape of the earbud was narrower and shorter, like the single flange ear bud, then the pressure of the sound transmitted would a higher dB. In order to test this hypothesis, the experiment consisted of playing a choice of three different songs through an earbud at different distances (0 cm, ¼ cm, or ½ cm) away from a sound pressure level meter (SPL) and recording the highest decibel levels observed. The earbud had one of the two earbud tips (single flange and bi flange) attached in each trial. The results of this experiment showed that the bi flange earbud transmitted higher level decibels that were more statistically significant (p= 0.003< α= 0.01) than the single flange earbud tip (p= 0.130 > α=0.01). Moving the earbud different distances from the sound pressure level meter (SPL) had a large effect on the sound pressure transmitted, however, the song selections did not have a large impact on the result. Both earbuds played at maximum volume produced levels at and above 90 dB at 0cm away and at ¼ cm. If a person were using the earbuds, with either of the flanges (single flange or bi flange), at maximum volume, they could possibly experience symptoms of hearing loss.

Location

Neville 306

Start Date

4-14-2018 9:45 AM

Presentation Format

Oral and Written

COinS
 
Apr 14th, 9:45 AM

The effect of different earbud tips on the pressure of sound transmitted

Neville 306

It has been observed in multiple experiments that teenagers use earbuds to listen to amplified music, these actions can lead to symptoms caused by possible hearing loss. The purpose of this experiment was to determine which earbud shape transmits higher levels of pressure in order to better understand which earbud shape is more detrimental to a person's health. It was hypothesized that if the shape of the earbud was narrower and shorter, like the single flange ear bud, then the pressure of the sound transmitted would a higher dB. In order to test this hypothesis, the experiment consisted of playing a choice of three different songs through an earbud at different distances (0 cm, ¼ cm, or ½ cm) away from a sound pressure level meter (SPL) and recording the highest decibel levels observed. The earbud had one of the two earbud tips (single flange and bi flange) attached in each trial. The results of this experiment showed that the bi flange earbud transmitted higher level decibels that were more statistically significant (p= 0.003< α= 0.01) than the single flange earbud tip (p= 0.130 > α=0.01). Moving the earbud different distances from the sound pressure level meter (SPL) had a large effect on the sound pressure transmitted, however, the song selections did not have a large impact on the result. Both earbuds played at maximum volume produced levels at and above 90 dB at 0cm away and at ¼ cm. If a person were using the earbuds, with either of the flanges (single flange or bi flange), at maximum volume, they could possibly experience symptoms of hearing loss.