The main responsible for acoustic emission in water and other liquids, rather than the liquid mass on its own, is the gas trapped inside emerging as a population of bubbles. From a physical point of view, a spherical bubble acts as an exponentially decaying sinusoidal oscillator. Frequency, decay time and relative amplitude of each bubble can be derived from its radius and depth.
When the bubble is formed close to the surface and therefore the effective mass around the liquid is reduced, the oscillating frequency rises and a characteristic ''blooping'' sound is generated. The amount of blooping can be set as an independent parameter in the model.
Signal processing routine. Call this function at sample rate to obtain a bubble sound.
- Returns
- Output sample
Object destructor.
- Parameters
-
| [in] | x | Pointer to the instance to destroy |
Object constructor.
- Returns
- Pointer to the new instance
| void SDTBubble_setDepth |
( |
SDTBubble * |
x, |
|
|
double |
f |
|
) |
| |
Sets the bubble depth.
- Parameters
-
| [in] | f | Bubble depth [0, 1]. 0 means very deep, 1 means touching the surface. |
| void SDTBubble_setRadius |
( |
SDTBubble * |
x, |
|
|
double |
f |
|
) |
| |
Sets the bubble radius.
- Parameters
-
| [in] | f | Bubble radius, in m [0.00015, 0.150] |
| void SDTBubble_setRiseFactor |
( |
SDTBubble * |
x, |
|
|
double |
f |
|
) |
| |
Sets the amount of blooping.
- Parameters
-
| [in] | f | Rise factor, positive scalar. Typical value for bubbles in water = 0.1 |
1.8.10 
