en riggning av respektive byggnad med sådana enorma mängder sprängmedel/termit som måste ha krävts, måste ha varit så omfattande att det måste ha upptäckts
en riggning av respektive byggnad med sådana enorma mängder sprängmedel/termit som måste ha krävts, måste ha varit så omfattande att det måste ha upptäcktsJa
en riggning av respektive byggnad med sådana enorma mängder sprängmedel/termit som måste ha krävts, måste ha varit så omfattande att det måste ha upptäcktsJa
en riggning av respektive byggnad med sådana enorma mängder sprängmedel/termit som måste ha krävts, måste ha varit så omfattande att det måste ha upptäckts
en riggning av respektive byggnad med sådana enorma mängder sprängmedel/termit som måste ha krävts, måste ha varit så omfattande att det måste ha upptäckts
Blast from the smallest charge capable of failing a single critical column would have resulted in a sound level of 130 dB to 140 dB at a distance of at least half a mile. There were no witness reports of such a loud noise, nor was such a noise heard on the audio tracks of video recordings of the WTC 7 collapse.NIST NCSTAR 1A sid xxxvi-xxxvii
The calculations showed that all the hypothethical blast scenarios and charge sizes would have broadcast significant sound levels from all the building faces. osvDet noggrannaste genomgången av ljuden finns dock på sid 289 i NIST NCSTAR 1-9 där man även skriver att man analyserat bland annat filmen med den intervjuade kvinnan som duckar:
However, soundtracks from videos being recorded at the time of the collapse did not contain any sound as intense as would have accompanied such a blast
Three videos in the database included soundtracks that were used to investigate the audio signature associated with the period immediately prior to and during the collapse ofWTC 7. All of these cameras were located at street level at least 640 m (2100 ft) from the building. Also, there were numerous other buildings between the cameras and WTC 7.
The most usable soundtrack was recorded by Camera 3, with its West Street location. This video ran for many minutes prior to and during the collapse. Even though sound was recorded by the camera, no interviews or commnentary were recorded, and the microphone tended to pick up low level street sounds, such as sirens, traffic, and distant conversations. Occasionally, the camera operators located nearby were recorded at a much louder level. Since the collapse was recorded on the video, it was possible to coordinate the sound recording with the actual WTC 7 collapse.
A careful review of the audio clip did not reveal any sounds that could be associated with WTC 7 until the global collapse began. [lite teknikaliteter bortplockade - se rapporten] The amplitude of the sound signal increased while the global collapse was taking place, but there were no loud, explosive sounds when the collapse began.
The response of the camera operators provides another indication of the audio environment. Even though the east penthouse began to descend into the building 6.9 s prior to initiation of global collapse, there was no verbal response from the camera operators until 2.5 s after the global collapse began, when a loud shout of "whoa, whoa, whoa, whoa" was heard. There is no evidence that the operators heard something that attracted their attention prior to this time.
At the same tilne the Camera 3 video was being shot, a recorded street interview was being conducted a short distance away on West Street. In this video clip of the interview, WTC 7 is visible in the upper left hand corner of the frame. Even though the east penthouse can be seen disappearing into the building, neither the camera operator, interviewer, nor interviewee responded in any way until just over 3 s after the global collapse began.
[läs vidare i rapporten]
At the same time the Camera 3 video was being shot, a recorded street interview was being conducted a short distance away on West Street. In this video clip of the interview, WTC 7 is visible in the upper left hand corner of the frame. Even though the east penthouse can be seen disappearing into the building, neither the camera operator, interviewer, nor interviewee responded in any way until just over 3 s after the global collapse began.
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Flashback finansieras genom donationer från våra medlemmar och besökare. Det är med hjälp av dig vi kan fortsätta erbjuda en fri samhällsdebatt. Tack för ditt stöd!
Swish: 123 536 99 96 Bankgiro: 211-4106