23.54MB |
SB-THS01: Thunder Strike | $15.00 |
| A varied collection of electrifying sound-designed thunder sound effects including: powerful lightning strikes with rumbles, and huge thunder cracks all without rain. From The SE & Private Collection SFX Library. 10 Files. |
All files are 16-bit / 44.1 kHz Broadcast WAV files, embedded with Soundminer metadata. The files are compressed/collected in a single .zip file for ease of download.
Description (PDF) |
Time |
|---|---|
| Thunder, Lightning: Powerful Lightning Strike | 00:10 |
| Thunder, Lightning: Powerful Lightning Strike And Heavy Thunder Rumble | 00:15 |
| Thunder, Lightning: Powerful Lightning Strike And Heavy Thunder Rumble | 00:13 |
| Thunder, Lightning: Powerful Lightning Strike And Heavy Thunder Rumble | 00:13 |
| Thunder, Lightning: Powerful Lightning Strike And Heavy Thunder Rumble | 00:19 |
| Thunder: Heavy, Distant Rolling Thunder | 00:35 |
| Thunder: Heavy, Distant Rolling Thunder | 00:26 |
| Thunder: Heavy, Distant Rolling Thunder | 00:18 |
| Thunder: Large Thunder Crack With Heavy Rumble | 00:19 |
| Thunder: Large Thunder Crack With Heavy Rumble | 00:20 |
| SB-THND1: Thunder 1 - From The Recordist Thunder HD SFX Library Powerful lightning strikes, large claps & rolling rumbles. Recorded at 24Bit-96kHz. |
Details | $20.00 |
| SB-THND2: Thunder 2 - From The Recordist Thunder HD SFX Library large rolling rumbles & large claps most without rain. Recorded at 24Bit-96kHz. |
Details | $20.00 |
| SB-THND3: Thunder 3 - From The Recordist Thunder HD SFX Library Approaching storm, distant rolling & claps most without rain. Recorded at 24Bit-96kHz. |
Details | $20.00 |
| SB-THM01: Thunder Mountain - From The Special Edition SFX Library Large rolling rumbles, distant rolling, powerful lightning strikes, & huge cracks. 16Bit-44.1kHz |
Details | $25.00 |
| SB-THS02: Thunder Strike II - From The Special Edition SFX Library Powerful lightning strikes & intense thunder cracks/rumbles all without rain. 16Bit-44.1kHz |
Details | $20.00 |
| SB-THS03: Thunder Strike III - From The Recordist Thunder HD SFX Library (HD) *NEW* Fierce, ripping sound-designed thunder sound effects including lightning strikes. |
Details | $25.00 |
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Thunder is the sound made by lightning. Depending on the nature of the lightning and distance of the listener, it can range from a sharp, loud crack to a long, low rumble (brontide). The sudden increase in pressure and temperature from lightning produces rapid expansion of the air surrounding and within a bolt of lightning. In turn, this expansion of air creates a sonic shock wave which produces the sound of thunder. Fear of thunder is known as ceraunophobia.
Cause
The cause of thunder has been the subject of centuries of speculation and scientific inquiry. The first recorded theory is attributed to the Greek philosopher Aristotle in the third century BC, and an early speculation was that it was caused by the collision of clouds. Subsequently, numerous other theories have been proposed. By the mid-19th century, the accepted theory was that lightning produced a vacuum. In the 20th century a consensus evolved that thunder must begin with a shock wave in the air due to the sudden thermal expansion of the plasma in the lightning channel. In a fraction of a second the air is heated to a temperature approaching 28,000 °C (50,000 °F). This heating causes it to expand outward, plowing into the surrounding cooler air at a speed faster than sound would travel in that cooler air. The outward-moving pulse that results is a shock wave, similar in principle to the shock wave formed by an explosion, or at the front of a supersonic aircraft. More recently, this consensus has been eroded by the observation that measured overpressures in simulated lightning are greater than what could be achieved by the amount of heating found. Alternative proposals rely on electrodynamic effects of the massive current acting on the plasma in the bolt of lightning.
Calculating distance
A flash of lightning, followed after some seconds by a rumble of thunder is, for many people, the first illustration of the fact that sound travels more slowly than light. Using this difference, one can estimate how far away the bolt of lightning is by timing the interval between seeing the flash and hearing thunder. The speed of sound in dry air is approximately 343 m/s or 1,127 feet per second or 768 mph (1,236 km/h) at 68°F (20 °C). The speed of light is high enough that it can be taken as infinite in this calculation. Therefore, the lightning is approximately one kilometer distant for every 2.9 seconds (or one mile for every 4.6 seconds). In the same five seconds the light could have circled the globe 37 times. Thunder is seldom heard at distances over 24 kilometers (15 miles). A flash of lightning and a simultaneous sharp "clap!" of thunder, a thunderclap, therefore indicates that the lightning strike was very near.