80
SWL
o
=
(
)
10 10
log
/
W W
Where
SWL = sound level power expressed in decibels
W = the acoustic power of the source
W o = the reference acoustic power of 10
−12
W
2.7 Electrical and Electronics
As discussed in Chap. 1, atoms are made up of negatively charged particles electrons, positively charged particles protons, besides neutral particles neutrons.
Distance
Amplitude
Wavelength
Time
Amplitude
Period1kg
Fig. 2.26 Line diagram of sound wave
Distance
Amplitude
Wavelength
2 wave length
Near Field
2 wave length to infinity
Far Field
Sound Source
Fig. 2.27 Line diagram explaining acoustics near field and far field
2 Fundamentals of Physics for Environmental and Medical Professionals
SWL
o
=
(
)
10 10
log
/
W W
Where
SWL = sound level power expressed in decibels
W = the acoustic power of the source
W o = the reference acoustic power of 10
−12
W
2.7 Electrical and Electronics
As discussed in Chap. 1, atoms are made up of negatively charged particles electrons, positively charged particles protons, besides neutral particles neutrons.
Distance
Amplitude
Wavelength
Time
Amplitude
Period1kg
Fig. 2.26 Line diagram of sound wave
Distance
Amplitude
Wavelength
2 wave length
Near Field
2 wave length to infinity
Far Field
Sound Source
Fig. 2.27 Line diagram explaining acoustics near field and far field
2 Fundamentals of Physics for Environmental and Medical Professionals