Input interpretation
threshold hearing distance
Input values
source pressure level | 90 dB SPL (decibels sound pressure level) dry bulb temperature | 21 °C (degrees Celsius) relative humidity | 49.4% air pressure | 1012 mbar (millibars) frequency | 2500 Hz (hertz) directivity factor | spherical
Result
threshold hearing distance from source | 1831.5 meters = 6008.9 feet = 1.138 miles
Sound attenuation with distance
Sound attenuation with distance
Psychrometric properties
wet bulb temperature | 14.5 °C (degrees Celsius) dew point temperature | 10 °C (degrees Celsius)
Moist air properties
density | 1.194 kg/m^3 (kilograms per cubic meter) humidity ratio | 0.00768 kg of water/kg of dry air (kilograms of water per kilogram of dry air) speed of sound | 342.9 m/s (meters per second) absorption coefficient | 13.52 dB SPL/km (decibels sound pressure level per kilometer) isobaric heat capacity | 1.013 kJ/(kg K) (kilojoules per kilogram kelvin) isochoric heat capacity | 0.7439 kJ/(kg K) (kilojoules per kilogram kelvin) heat capacity ratio | 1.362 molecular weight | 28.83 g/mol (grams per mole)
Composition fractions
| molar | mass dry air | 98.78% | 99.24% water | 1.22% | 0.7622% nitrogen | 77.17% | 75% oxygen | 20.7% | 22.98% argon | 0.9088% | 1.259%