Define decibel. (Module 15.20A) Define decibel. (Module 15.20A) Decibels are units of pressure. Decibels are units...
Define decibel. (Module 15.20A)
Define decibel. (Module 15.20A)
| Decibels are units of pressure. |
| Decibels are units of light. |
| Decibels are units of the intensity of sound. |
| Decibels are units of force. |
| Decibels are units of wavelengths. |
Homework Answers
Decibels are units of the intensity of sound. Regarding the events involved in hearing: vibration of the basilar membrane causes vibration of hair cells against the tectorial membrane.
So option 3 is correct.
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Define decibel. (Module 15.20A)
Define decibel. (Module 15.20A)
Decibels are units of pressure.
Decibels are units...
To understand the decibel scale. The decibel scale is a logarithmic scale for measuring the sound...
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...
The decibel scale is a logarithmic scale for measuring the sound intensity level. Because the decibel...
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 sound waves, I0 is taken...
Taking a decibel to be an increase in pressure of 12.2%, by what factor has the...
Taking a decibel to be an increase in pressure of 12.2%, by what factor has the pressure changed when the sound level has fallen by 9.00 decibels?
Sound is often characterized by the decibel scale. 60 decibels is normal conversation and that corresponds...
Sound is often characterized by the decibel scale. 60 decibels is normal conversation and that corresponds to a sound pressure level of about 0.02 Pa. Consider the A-440 pure tone. This is a sine wave at 440 Hz with an amplitude of 0.02 Pa. If this wave travels through air at standard conditions, determine the wavelength of the wave, and variation of pressure, temperature, and density with time as one wave passes through a given receiving location. 4.
The decibel rating D| is related to the sound intensity I| by the formula D =...
The decibel rating D| is related to the sound intensity I| by the formula D = 10 log_10 (I/10^-16)| for the noise level in decibels. Let D| and d| represent the decibel ratings of sounds of intensity I| and i|, respectively. Using properties of logarithms, find a simplified formula for the difference between the two ratings, D-d|, in terms of the two intensities I land i|. help (logarithms) (Enter log10 or logten for the base 10 logarithm.) If a sound's...
Taking a decibel to be an increase in pressure of 12.2%, by what factor has the...
Taking a decibel to be an increase in pressure of 12.2%, by what factor has the pressure changed when the sound level has fallen by 3.00 decibels? I have seen this question asked before, but I always see 2 answers (percentages). Please indicate which one is correct, or if there is a value for the factor, indicate that instead.
. A sound wave at the 7 decibel level of loudness has what intensity? If the...
. A sound wave at the 7 decibel level of loudness has what intensity? If the amplitude of this wave were doubled, what would be the 1oudness in decibels? Explain how you would compute the combined loudness level of two sounds which are individually at B dB and β2 dB
Calculate the acoustic sound intensity level in decibels for a sound wave travelling in air at...
Calculate the acoustic sound intensity level in decibels for a sound wave travelling in air at 10 degree C and having a pressure amplitude of 0.656 Pa.
[2] Explain why we use a logarithmic decibel scale instead of Pascals when discussing the energy...
[2] Explain why we use a logarithmic decibel scale instead of Pascals when discussing the energy n sound waves E. F. [ Sound intensity & sound intensity level - Watch units! a. [0.5] Determine the sound intensity level of a sound whose intensity is 0.0051 W/m2 b. [0.5] Determine the sound intensity of a sound whose sound intensity level is 72 dB (re: 10-12 W/m2). G. Sound power & sound power level - Watch units! a. [0.5] Determine the sound...
[6] The reference sound pressure was used to set the starting point of the decibel scale...
[6] The reference sound pressure was used to set the starting point of the decibel scale for sound pressure level. J. a. L2] Describe how the reference sound pressure was obtained. b. [2] Is it possible for a person to hear -10 dB (re: 20 uPa)? Explain why or why not. c. [2] If new research showed that the quietest sound pressure level that most people could detect is -10 dB (re: 20 uPa), what should the reference sound pressure...
Sound is often characterized by the decibel scale. 60 decibels is normal conversation and that corresponds to a sound pressure level of about 0.02 Pa. Consider the A-440 pure tone. This is a sine wave at 440 Hz with an amplitude of 0.02 Pa. If this wave travels through air at standard conditions, determine the wavelength of the wave, and variation of pressure, temperature, and density with time as one wave passes through a given receiving location. 4.
The decibel rating D| is related to the sound intensity I| by the formula D = 10 log_10 (I/10^-16)| for the noise level in decibels. Let D| and d| represent the decibel ratings of sounds of intensity I| and i|, respectively. Using properties of logarithms, find a simplified formula for the difference between the two ratings, D-d|, in terms of the two intensities I land i|. help (logarithms) (Enter log10 or logten for the base 10 logarithm.) If a sound's...
. A sound wave at the 7 decibel level of loudness has what intensity? If the amplitude of this wave were doubled, what would be the 1oudness in decibels? Explain how you would compute the combined loudness level of two sounds which are individually at B dB and β2 dB
[2] Explain why we use a logarithmic decibel scale instead of Pascals when discussing the energy n sound waves E. F. [ Sound intensity & sound intensity level - Watch units! a. [0.5] Determine the sound intensity level of a sound whose intensity is 0.0051 W/m2 b. [0.5] Determine the sound intensity of a sound whose sound intensity level is 72 dB (re: 10-12 W/m2). G. Sound power & sound power level - Watch units! a. [0.5] Determine the sound...
[6] The reference sound pressure was used to set the starting point of the decibel scale for sound pressure level. J. a. L2] Describe how the reference sound pressure was obtained. b. [2] Is it possible for a person to hear -10 dB (re: 20 uPa)? Explain why or why not. c. [2] If new research showed that the quietest sound pressure level that most people could detect is -10 dB (re: 20 uPa), what should the reference sound pressure...
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