(a)
Find the intensity in watts per meter squared of a 200 Hz sound having a loudness of 30 phons.
W/m2
(b)
Find the intensity in watts per meter squared of a 10,000 Hz sound having a loudness of 60 phons.
W/m2
Sound level
Where
a)
At frequency , with loudness , sound level is ( the green lines in the above figure)
Intensity is
b)
At frequency , with loudness , sound level is ( the blue lines in the above figure)
Intensity is
(a) Find the intensity in watts per meter squared of a 200 Hz sound having a...
(a) Find the intensity in watts per meter squared of a 200 Hz sound having a loudness of 30 phons. W/m2 (b) Find the intensity in watts per meter squared of a 10,000 Hz sound having a loudness of 60 phons. W/m2
A.)Find the intensity in watts per meter squared of a 60.0 Hz sound having a loudness of 10 phons. B.) Find the intensity in watts per meter squared of a 10,000 Hz sound having a loudness of 60 phons.
(a) What is the intensity in watts per meter squared of a just barely audible 200-Hz sound? (b) What is the intensity in watts per meter squared of a barely audible 4000-Hz sound?
What is the intensity in 10-4 watts per meter squared of 84 dB sound?
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 intensity of a whisper at a distance of 3.0 m, in W/m^2? Express your answer in watts per meter squared. W/m2
A point source of sound generates a 200 Hz tone. The wave has an intensity of 2.2×10−8 W/m2 at a distance of 3 m from the source. Find the total sound power at the source. At what distance from the source is the decibel level below 15 dB? What is the intensity of the sound at this distance?
5) An ultrasound wave with an intensity of 46,500 watts per square meter and a frequency of 55.0 kHz is used to shatter a kidney stone. Find the sound intensity level and the wavelength for this ultrasound wave if the wave is traveling in air at room temperature (speed of sound is 343 m/s).
Table 15.3 Sound intensity levels and intensities of common environmental sounds ReviewI Constants Periodic Table Sound β(dB) 1(W/m2) Threshold of Part A hearing 1.0 10-12 Person breathing, A whisper, atm 20 1.0x 1010 Classroom during Residential street, Quiet restaurant Normal Table 15.3 in the textbook gives an estimate for the sound intensity of a whisper at 1.0 m. What is the sound intensity of a whisper at a distance of 2.5 m, in W/m Express your answer in watts per...
9. Sound levels are measured by the logarithmic decibel scale, named after Alexander Graham Bell. The sound level, L, corresponding to an intensity of I, in watts per square metre, is し= 10 log-, where lo is the minimum intensity audible to the human ear. If amplified rock music has a loudness of 120 dB and ordinary conversation has a loudness of 50 dB, how many times louder than ordinary conversation is amplified rock music? 9. Sound levels are measured...