01-09-2014, 11:02 PM
According to this article http://www.coe.montana.edu/ee/rmaher/pub...c_0406.pdf
a supersonic whip crack differs from a muzzle blast by being roughly 1/10th the duration of the noise and, apparently, the "underpressure" (acoustic area under the midline) has nearly the same amplitude and duration as the "overpressure", whereas for a muzzle blast the underpressure is not the same amplitude, though it appears to be longer duration than the overpressure area.
Too bad I cant separate the chart from the paper to go along with my rather poor explanation.
I wonder if a "firecracker" noise is more like a "shock wave" or a "muzzle blast"?
a supersonic whip crack differs from a muzzle blast by being roughly 1/10th the duration of the noise and, apparently, the "underpressure" (acoustic area under the midline) has nearly the same amplitude and duration as the "overpressure", whereas for a muzzle blast the underpressure is not the same amplitude, though it appears to be longer duration than the overpressure area.
Too bad I cant separate the chart from the paper to go along with my rather poor explanation.
I wonder if a "firecracker" noise is more like a "shock wave" or a "muzzle blast"?
"All that is necessary for tyranny to succeed is for good men to do nothing." (unknown)
James Tracy: "There is sometimes an undue amount of paranoia among some conspiracy researchers that can contribute to flawed observations and analysis."
Gary Cornwell (Dept. Chief Counsel HSCA): "A fact merely marks the point at which we have agreed to let investigation cease."
Alan Ford: "Just because you believe it, that doesn't make it so."
James Tracy: "There is sometimes an undue amount of paranoia among some conspiracy researchers that can contribute to flawed observations and analysis."
Gary Cornwell (Dept. Chief Counsel HSCA): "A fact merely marks the point at which we have agreed to let investigation cease."
Alan Ford: "Just because you believe it, that doesn't make it so."