| (1) Air Speed of Sound as function of Temperature (m/s) |
 | (2) Vibrating String |
| (3) Tension (N/m2) |
| (4) Length of the string (m) |
| (5) Linear mass (kg/m) |
 | (6) Vibrating frequenz of a String and harmonics (n > 1) - (1/s = Hz) |
 | (7) Wave length (m) |
 | (8) Elasticity module (N/m2) |
 | (9) Density of the media (kg/m3) |
 | (10) Sound speed in solids (m/s) |
 | (11) Compressibility of a liquid (m2/N) |
 | (12) Speed of sound in liquids (m/s) |
| (13) Heat capacity ratio |
| (14) Universal gas constant (Nm/kg grd) |
| (15) Absolute temperature |
| (16) Speed of sound in gas |
 |
| (18) Acoustic Doppler effect (equation not aplicable to light) |
| (19) Root mean square (RMS) pressure deviation from atmospheric pressure |
| (20) Reference sound pressure level |
| (21) Sound pressure level (dB Dezibel SPL) |
| (22) Maximum Speed of a particle in the media (m/s) |
| (23) Reference sound velocity level |
| (24) Sound velocity level (dB Dezibel SVL) |
| (25) Acoustic Impedance (kg/m2s) |
| (26) Acoustic intensity (J/m2) |
| (27) Reference sound intensity level (W/m2) |
| (28) Sound Intensity level (dB Dezibel SIL) |
| (29) Cross section (m2) |
| (30) Acoustic Power (W) |
| (31) Reference sound power level (W) |
| (32) Sound power level (dB Dezibel SPL) |
| (33) Conservation of momentum (constant density and sound speed) |
| (34) Conservation of mass (constant density and sound speed) |
| (35) Acoustic Wave equation |
Acoustics
