ANALYSIS OF ISRAELI TEEN CALL TO POLICE
Often in the course of investigations telephone call audio is useful in determining whether weapons were used, and if so,
the number and types of the weapons.
Not long ago, at the request of Connecticut, I performed an audio gunshot analysis of the Sandy Hook 911 calls,
as well as an officer's open mike on his two-way radio, to determine thenumber and types of weapons used in the massacre.
The calls and radio signal were played while observing the audio waveform using sophisticated forensic tools,
so that the times of gunshots could be observed to within one ten-thousandth of a second accuracy.
The results were forwarded to the State of Connecticut for inclusion in their Final Report on Sandy Hook.
Presently the Israeli government has just released the telephone call of one of the kidnapped teens, to police.
I have conducted a preliminary examination of the 45-second telephone call.
I preliminarily find that two weapons were used, the first shot coming from a different weapon than the remaining ten shots
that follow.
The above is a plot of the audio waveform for the entire 45-second call. The red markers denote
gunshots, eleven in total.
An expanded plot of the area of gunshots follows:
The plot shows an initial shot, followed by a burst of ten shots.
Although the frequency response of the telephone system is limiting, the sharp, transient sounds
are easily identifed as gunshots.
This information, performed by experts, comparing to the sounds of test firing of known weapons
can be used to identify types of weapons recorded in the telephone call.
For additional information please feel free to contact me at:
Paul Ginsberg, President
Professional Audio Laboratories, Inc.
www.proaudiolabs.com
(914) 263-8010