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| Speed/Wavelength | Calculate sound speed/wavelength in air, depending on frequence and temperature |
| Absorption of sound in air | Attenuation in air, depending on temperature, frequence and humidity. The curve is drawn depending on kind selection. These calculations do not give the correct values when sound is passing over landscape. |
| Weight A | Correction for hearing sensitivity at low sound levels |
| Weight B | Correction for hearing sensitivity at medium sound levels (Very seldom used) |
| Weight C | Correction for hearing sensitivity at high sound levels |
| Weight D | Correction for hearing sensitivity for airplane sound |
| Weight U | Correction for hearing sensitivity at ultrasonic sounds |
| Weight AU | Combination of A and C |
| dB to Phones | Conversion from measured level to perceived level |
| Phones to dB | Conversion from perceived to measured level |
| Frequence | Frequence of sound |
| Temperature | Temperature of air |
| Moving speed | Speed difference between sound source and listener |
| Rel. humidity | Humidity of air, use Weather and air for conversion from other units (dewpoint) |
| Pressure | Actual air pressure, leave empty for standard sea level pressure. |
| Distance | Distance to calculate attenuation and run time for |
| Phons. | Perceived sound level |
| dB | Measured sound level |
| Wavelength | Frequence/speed |
| Speed | Speed of sound at specified conditions |
| Closing freq. | Frequence if distance between sound source and listener is decreasing (doppler effect) |
| Opening freq. | Frequence if distance between sound source and listener is increasing (doppler effect) |
| Att. | Attenuation of sound in air at specified distance |
| Run time | Time for sound to move specified distance |
| x-Weigth | See "Functions" above |
| Sound pressure | Measured sound level |
| Sound loudness | Perceived sound level |