Fact Sound Effect Download
Osmani Horowitz
Our free informative and factual music is designed for productions such as documentaries, infomercials, YouTube videos and anytime you require music to provide a sense of knowledge, learning, science etc.
While sound moves at a much faster speed in the water than in air, the distance that sound waves travel is primarily dependent upon ocean temperature and pressure. While pressure continues to increase as ocean depth increases, the temperature of the ocean only decreases up to a certain point, after which it remains relatively stable. These factors have a curious effect on how (and how far) sound waves travel.
The area in the ocean where sound waves refract up and down is known as the "sound channel." The channeling of sound waves allows sound to travel thousands of miles without the signal losing considerable energy. In fact, hydrophones, or underwater microphones, if placed at the proper depth, can pick up whale songs and manmade noises from many kilometers away.
Ok my wild theory is that educational videos like below that explained how computers worked often had cheap synthesizer music and sound fx soundtracks and over the time this bled into the sounds people thought mainframe computers themselves made.
Ok my wild theory is that educational videos like below that explained how computers worked often had cheap synthesizer music and sound fx soundtracks and over the time this bled into the sounds people thought mainframe computers themselves made. fact the only sounds were generally the sound of cooling fans, whirring tape heads and golfball style printheads loudly banging out typed output.
Named after the character Private Wilhelm in the 1953 western The Charge at Feather River, the loud scream effect was actually first heard in the 1951 film Distant Drums. Exact reports are a bit fuzzy, but researchers have guessed that the voice belongs to a minor character actor named Sheb Wooley, and was recorded as ADR for a scene in which a soldier is being eaten by an alligator.
One of the first major breakthroughs in the realm of sound effects and design, the famous sound designer Murray Spivack was responsible for creating some of the first technical achievements in movie sound effects.
With the help of the famous score by composer Bernard Hermann (regarded as perhaps the greatest film composer of all time), The Birds is a master class into how to blend diegetic and non-diegetic sounds to create an auditory cacophony to simultaneously startle and mesmerize your audience more than even visuals could.
Streisand famously lobbied director Wyler to let her perform the songs live on set, instead of going with pre-recorded tracks. The decision ultimately aided the film, as well as notably helped the sound recording and design community forward in their abilities to capture quality audio on set over in studio.
Many, if nearly all, of these sound effects came from sound designer Ben Burtt, who spent years perfecting the various effects for the film as he came up with ingenious, and often quite practical, ways to record and create effects for the lightsabers, R2-D2, Chewbacca, and tons of the other sound effects still in use today.
One of my favorite films on our list, David Lynch spent several years perfecting every single detail of his experimental (first) horror film Eraserhead. Working with sound designer Alan Splet, Lynch would experiment heavily with how abstract sound design and effects could help shape his haunting, yet beautiful, industrial cityscape, as well as to develop his complex themes and motifs throughout the film.
Finally, perhaps considered the new pinnacle in technical achievement in sound effects and design, the Wachowskis (Lana and Lilly) brought a wide array of sophisticated visual and audio effects to the table with their breakout 1999 sci-fi hit The Matrix.
Overall, the film represented a new world of sorts, as much of the production relied on digital effects contained in a simulated, digital world. As such, sound designer Dane Davis created a range of new digitized sounds to represent this new online world creation, making use of everything from old computer noises to new artificial effects and sounds.
is there any way I can reduce the intensity of this animal eating sound effect to make it sound less intense, more normal eating, less gorey sounding, like gate the intensity of it or something in Audacity???
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Sonic boom is an impulsive noise similar to thunder. It is caused by an object moving faster than sound -- about 750 miles per hour at sea level. An aircraft traveling through the atmosphere continuously produces air-pressure waves similar to the water waves caused by a ship's bow. When the aircraft exceeds the speed of sound, these pressure waves combine and form shock waves which travel forward from the generation or "release" point.
As an aircraft flies at supersonic speeds it is continually generating shock waves, dropping sonic boom along its flight path, similar to someone dropping objects from a moving vehicle. From the perspective of the aircraft, the boom appears to be swept backwards as it travels away from the aircraft. If the plane makes a sharp turn or pulls up, the boom will hit the ground in front of the aircraft.
The sound heard on the ground as a "sonic boom" is the sudden onset and release of pressure after the buildup by the shock wave or "peak overpressure." The change in pressure caused by sonic boom is only a few pounds per square foot -- about the same pressure change we experience on an elevator as it descends two or three floors -- in a much shorter time period. It is the magnitude of this peak overpressure that describes a sonic boom.
There are two types of booms: N-waves and U-waves. The N-wave is generated from steady flight conditions, and its pressure wave is shaped like the letter "N." N-waves have a front shock to a positive peak overpressure which is followed by a linear decrease in the pressure until the rear shock returns to ambient pressure. The U-wave, or focused boom, is generated from maneuvering flights, and its pressure wave is shaped like the letter "U." U-waves have positive shocks at the front and rear of the boom in which the peak overpressures are increased compared to the N-wave.
For today's supersonic aircraft in normal operating conditions, the peak overpressure varies from less than one pound to about 10 pounds per square foot for a N-wave boom. Peak overpressures for U-waves are amplified two to five times the N-wave, but this amplified overpressure impacts only a very small area when compared to the area exposed to the rest of the sonic boom.
The strongest sonic boom ever recorded was 144 pounds per square foot and it did not cause injury to the researchers who were exposed to it. The boom was produced by a F-4 flying just above the speed of sound at an altitude of 100 feet.
In recent tests, the maximum boom measured during more realistic flight conditions was 21 pounds per square foot. There is a probability that some damage -- shattered glass, for example, will result from a sonic boom. Buildings in good repair should suffer no damage by pressures of less than 16 pounds per square foot. And, typically, community exposure to sonic boom is below two pounds per square foot. Ground motion resulting from sonic boom is rare and is well below structural damage thresholds accepted by the U.S. Bureau of Mines and other agencies.
Characteristics
The energy range of sonic boom is concentrated in the 0.1 - 100 hertz frequency range that is considerably below that of subsonic aircraft, gunfire and most industrial noise. Duration of sonic boom is brief; less than a second -- 100 milliseconds (.100 seconds) for most fighter-sized aircraft and 500 milliseconds for the space shuttle or Concorde jetliner .
The intensity and width of a sonic boom path depends on the physical characteristics of the aircraft and how it is operated. In general, the greater an aircraft's altitude, the lower the overpressure on the ground. Greater altitude also increases the boom's lateral spread, exposing a wider area to the boom. Overpressures in the sonic boom impact area, however, will not be uniform. Boom intensity is greatest directly under the flight path, progressively weakening with greater horizontal distance away from the aircraft flight track.
Ground width of the boom exposure area is approximately one mile for each 1,000 feet of altitude; that is, an aircraft flying supersonic at 30,000 feet will create a lateral boom spread of about 30 miles. For steady supersonic flight, the boom is described as a carpet boom since it moves with the aircraft as it maintains supersonic speed and altitude.
Some maneuvers, diving, acceleration or turning, can cause focusing of the boom. Other maneuvers, such as deceleration and climbing, can reduce the strength of the shock. In some instances weather conditions can distort sonic booms.
Sonic Boom Refraction
Depending on the aircraft's altitude, sonic booms reach the ground two to 60 seconds after flyover. However, not all booms are heard at ground level. The speed of sound at any altitude is a function of air temperature. A decrease or increase in temperature results in a corresponding decrease or increase in sound speed.
Under standard atmospheric conditions, air temperature decreases with increased altitude. For example, when sea-level temperature is 58 degrees Fahrenheit, the temperature at 30,000 feet drops to minus 49 degrees Fahrenheit. This temperature gradient helps bend the sound waves upward. Therefore, for a boom to reach the ground, the aircraft speed relative to the ground must be greater than the speed of sound at the ground. For example, the speed of sound at 30,000 feet is about 670 miles per hour, but an aircraft must travel at least 750 miles per hour (Mach 1.12, where Mach 1 equals the speed of sound) for a boom to be heard on the ground.
Background
The Air Force has conducted faster-than-sound test flights since 1947, and today most Air Force fighter aircraft are capable of supersonic speed. Consequently, supersonic training flights that simulate actual combat conditions are necessary to ensure the success and survival of aircrews during wartime. However, Air Force procedures require that, whenever possible, flights be over open water, above 10,000 feet and no closer than 15 miles from shore. Supersonic operations over land must be conducted above 30,000 feet or, when below 30,000 feet, in specially designated areas approved by Headquarters United States Air Force, Washington, D.C., and the Federal Aviation Administration.
Public Interest Responsibilities
The Air Force continues to expand its knowledge of sonic boom. Continuing research specifically addresses modeling the generation of a sonic boom and its impact on the environment -- people, domestic animals, wildlife, and historical, unconventional and conventional structures. This research provides the Air Force with tools to mitigate sonic boom disturbances through flight operations planning and land use compatibility planning.