Four.
Doubled.
loudness is the magnitude of wave of sound(the highest point reached by the wave). intensity is frequency of sound (that's how much a wave vibrates in 1 second)
It isn't louder (loudness has to do with intensity, and a small whistle can't generate that much intensity), it's a higher frequency. In the range that is inaudible to humans.
Scroll down to related links and look at "Sound level change and the change of the respective factor of volume / loudness, sound pressure / sound intensity".
The word loudness belongs to psycho acoustics and tells how we feel this sound, that is not measuring the sound like we do with a sound pressure meter. Listening to music means motion to the ear drums. Only sound pressure moves the ear drums. The energy or the sound intensity is much less important here. Sound intensity belongs more to the noise fighters.
The word loudness belongs to psycho acoustics and tells how we feel this sound, that is not measuring the sound like we do with a sound pressure meter. Listening to music means motion to the ear drums. Only sound pressure moves the ear drums. The energy or the sound intensity is much less important here. Sound intensity belongs more to the noise fighters.
(90 dB - 70 dB) = 20 dB = 100 times as much sound power.(100 times 'as much' = 99 times 'more')
The power in the wave is [ 30 dB = 1,000 times ] greater.
It's not so much the energy, but the intensity.Energy/time = power Power / cross sectional area = intensity Basically, other things being equal, if a sound has more intensity (so, more watts per square meter), you will perceive it as louder. However, the perceived loudness of a sound also varies a bit, depending on the frequency.
From a wave model perspective, the intensity of a sound (i.e. its "loudness") is dependent on the amount of energy that the sound wave carries. The energy of the wave is proportional to the amplitude, how far the wave goes up and down. Thus, the intensity of voice is dependent on how much force you applied to the air passing through your vocal cords, thus displacing them more (thus a bigger amplitude). Try it, put your hand to your throat and feel which sound is more noticeable (when you whisper, or when you shout).
No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.No, it is 10 times louder. dB is a logarithmic scale; every 10 dB, the intensity increases by a factor of 10. Thus, 10 dB is 10 times louder than 0 dB, 20 dB is 10 times louder than 10 dB, and 30 dB is 10 times louder than 20 dB.
No. The loudness is related to the amplitude - in the case of sound, how much is the pressure difference; or how far the molecules swing back and forth.No. The loudness is related to the amplitude - in the case of sound, how much is the pressure difference; or how far the molecules swing back and forth.No. The loudness is related to the amplitude - in the case of sound, how much is the pressure difference; or how far the molecules swing back and forth.No. The loudness is related to the amplitude - in the case of sound, how much is the pressure difference; or how far the molecules swing back and forth.