Thirty violins have an intensity 30 times that of one violin. What is the decibel difference that this corresponds to (give your answer in dB)?
Thirty violins have an intensity 30 times that of one violin. What is the decibel difference...
Recall that one decibel is one tenth of a bel. What intensity ratio does 20 dB correspond to?
The intensity of a sound from one source is 8000 times that of another. How much more is the decibel level of the louder sound than that of the quieter one? Answer: Db
(a) What is the decibel level of a sound that is three times as intense as a 42.7 dB sound? _____________dB (b) What is the decibel level of a sound that is one-eighth as intense as a 42.7 dB sound? _____________dB
To understand the decibel scale. The decibel scale is a logarithmic scale for measuring the sound intensity level. Because the decibel scale is logarithmic, it changes by an additive constant when the intensity as measured in W/m2 changes by a multiplicative factor. The number of decibels increases by 10 for a factor of 10 increase in intensity. The general formula for the sound intensity level, in decibels, corresponding to intensity I is β=10log(II0)dB, where I0 is a reference intensity. For...
Have you ever seen a negative decibel anywhere? Say for example -6 dB, what would be your interpretation of this number ?
1. If a sound of frequency 1000 Hz has intensity level 30 dB,
what would be the intensity level of sound frequency 50 Hz which
appears to have equal loudness? (Answer= 60 dB)
2. Intensity of 30 dB, 1000 Hz sound= (Answer= 1.000 x 10-9
W/m^2)
*3. What is intensity (in W/m^2) of the equal loudness 50 Hz
sound? (Answer is NOT 50.12 x 10^-12)
*4. What is the ratio of the pressure variation (in amplitude)
of the equal loudness...
What is the sound level of a sound with an intensity of I = 1.00×10-6 W/m2? Give your answer in dB units. A: 60.00 B: 79.80 C: 106.13 D: 141.16 E: 187.74 F: 249.69 G: 332.09 H: 441.69 Now the intensity of this sound is increased to a value of 38.0 times of its original intensity. What is the new increased sound level? Give your answer in dB units. A: 5.62 B: 8.16 C: 11.83 D: 17.15 E: 24.86 F:...
What intensity I1 corresponds to 20.0 dB ? Express your answer in watts per square meter. You are trying to overhear a most interesting conversation, but from your distance of 10.0 m , it sounds like only an average whisper of 20.0 dB . So you decide to move closer to give the conversation a sound level of 60.0 dB instead. How close should you come? View Available Hint(s) IVALO ? 11 = 9.9 W/m² Submit Previous Answers X Incorrect;...
PH1123-01, Spring 19 <12.1: Sound and Its Intensity Problem 12.13 Constants Part A One CD player is said to have a signal-to-noise ratio of 84 dB, whereas for a second CD playor it is 97 dB What is the ratio of intensities of the signal and the background noise for the first device? Express your answer using two signiflcant fnigures Submit Request Answer Part B What is the ratio of intenisites of the signal and the background nolse for the...
Among the thirty largest U.S. cities, the mean one-way commute time to work is 25.8 minutes. The longest one-way travel time is in New York City, where the mean time is 38.9 minutes. Assume the distribution of travel times in New York City follows the normal probability distribution and the standard deviation is 7.9 minutes. Use Appendix B.3. What percent of the New York City commutes are for less than 30 minutes? (Round your intermediate calculations and final answer to...