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The age of the person

10

20

30

40

50

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If the person being tested can still hear the sound being played

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1. The distance of the person to the sound - Measuring each trial 2 meters away with a long ruler from the iPad to the person

2. Playing the same sound on the iPad

3. The volume of the sound

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The independent variable in this experiment is the age of the people being tested. This will be changed by having different applicants who take the same hearing tests.

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The dependent variable in this experiment is the result of the hearing test. We will measure this in hertz.

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We should control the space in which the people are doing the hearing test so that the sound waves vibrate in the same way by holding the test in the same room for every applicant. Another variable that should be controlled is the volume at which the hearing test is administered, this can be controlled by providing a set volume for the test before the test and sticking to it throughout the test. Finally, another variable that should be controlled is where the person taking the test is in relation to the speaker administrating the test, this can be controlled by marking on the floor with tape or a chair where the person will sit and also marking where the speaker will be ahead of time.

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The tone (in Hz) of the sound and the age of the people who are listing to the sound (increased by 10years)

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Increase by 2x and x being the amount of Hz. The person will say stop as soon as they cannot hear the sound anymore.

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The amount of Hz it will increase by.

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One person of each age.

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The room they are in.

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The age of the test subject. We will get 5 people with the age of 20, 35, 50, 65, 80.

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Which age is too old for them to not be able to hear the 13000Hz. We will make them tell us when they stop hearing the continuous sound of the wave.

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1. The volume

2. The frequency of the sound

3. The room

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The frequency of the sound waves tested on the subject.

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At which frequency do the test subjects stop hearing the sound.

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The tone of sound (Hz) and the age of people taking the test by intervals of 10.

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The hertz would be inched by 2x, X meaning the current amount of hertz, for example if X=1 the next amount would be 2, now X=2 so the next amount is 4, until its getting harder for them to hear so we will only increase it by 2 Hertz

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1. The amount of sound its played on

2. The room

3. The program used