Acoustics Pt. 2 Word Scramble
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| Question | Answer |
| Sound level is expressed in terms of _______ | Intensity |
| Amplitude of ______ is related to sound intensity | Vibration |
| The _________ measures the relative intensity between two sounds | Decibel |
| Decibel (dB) | Unit of intensity that is really a ratio; a tenth of a Bel |
| Bel | A unit corresponding to an intensity ratio of 10 to 1 |
| Decibels use ________ in order to map the wide value range of our perception | Logarithmic scale |
| A doubling of intensity increases sound by approximately _________ | 3 dB |
| dB does not correlate with? | What we perceive |
| We cannot estimate sound intensity by? | What we hear |
| 3 dB increases is _______ noticeable | Barley |
| 10 dB increase will sound ______ as loud | 2x |
| (Logarithmic basics) The log of any number can be expressed as? | An integral exponent of 10 (count the zeros) |
| (Logarithmic basics) Numbers greater than 1 have _________, less than 1 will have __________ | Positive logs, negative logs |
| Decibels are based on relative differences in intensity, they require a ______ | Reference value |
| What are the two ways to measure sound intensity? | dB IL (intensity level) and dB SPL (sound pressure level) |
| dB IL (intensity level) | Measures the output intensity |
| What is the formula for dB IL? | dB IL=10 (log10 Wo/Wr) |
| dB SPL (sound pressure level) | Measures sound pressure level at the ear drum |
| What is the formula for dB SPL? | dB SPL=20 (log10 Po/Pr) |
| Power is measured with the unit of _______ | Watt |
| Power is ______ over time | Energy |
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RachelJClark
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