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02_Worksheet - A microphone's output level is rated at-80db...

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Name ___________________ Date _____________ Worksheet 2 - turn in on 2/5 A sound is doubled in loudness. How many decibels has it increased? What is the range of human hearing in decibels (from the threshold of hearing to the threshold of pain)? A sound is lowered so that it is half as loud. How many decibels has it decreased? If the pressure of a sound wave increases by 10, how many decibels does the sound increase? If the voltage used to produce a sound in a loudspeaker increases from .2 volts to 20 volts, what is the change in volume in decibels? If a sound is getting softer, is the decibel change a positive or negative value? If the voltage level used to represent a sound changes from .05 by -20 decibels, what is the new voltage level? An increase of 10 times the original amplitude will result in a volume change of how many decibels? The sound intensity of the threshold of pain is how many times the sound intensity of the threshold of hearing?
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Unformatted text preview: A microphone's output level is rated at -80db. If 0db = 1 volt, what is the nominal output voltage? Sound level 1 Sound level 2 Decibels +++++++++++++++++++++++++++++++++++++ 10 100 100-20 1 .01 Name ___________________ Date _____________ .1 40 Name ___________________ Date _____________ Lab 2 Narrative- turn in on 2/5 Open the file: 01_Decibels.pdf (or .doc), read it and follow the instructions. Please answer the questions from the lab on this sheet: Question 1. What is the relationship between the sign of the decibel measure and the ratio? Question 2. What is the level in DB of a1 compared to the 1 volt reference in a2? Question 3. What is the level in DB of a1 compared to the 1 volt reference in a2? Question 4. What were the results for Test1? Question 5. What were the results for Test2? Question 6. The decibel measures should be similar for the two tests, but the voltage levels should be quite different. Why?...
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