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α: ACOUSTIC ATTENUATION COEFFICIENT
Aaprt: -12dB OUTPUT BEAM AREA
Deq: EQUIVALENT APERTURE DIAMETER
deq: EQUIVALENT BEAM DIAMETER
fawf: ACOUSTIC WORKING FREQUENCY
Ipa: PULSE-AVERAGE INTENSITY
Ipa,α: ATTENUATED PULSE-AVERAGE INTENSITY
Ipi: PULSE-INTENSITY INTEGRAL
Ipi,α: ATTENUATED PULSE-INTENSITY INTEGRAL
MI: MECHANICAL INDEX
P: OUTPUT POWER
Pα: ATTENUATED OUTPUT POWER
Pr: PEAK-RAREFACTIONAL ACOUSTIC PRESSURE
Prr: PULSE REPETITION RATE
TIS: SOFT-TISSUE THERMAL INDEX
td: PULSE DURATION
X,Y: -12dB OUTPUT BEAM DIMENSIONS
z: DISTANCE FROM THE SOURCE TO A SPECIFIED POINT
zb: DEPTH FOR TIB
zbp: BREAK-POINT DEPTH
zs: DEPTH FOR TIS
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