Mohamed Mohamed el-Amir Awad el-Sayed Atta ( / ˈ æ t ɑː/ AT-ah Arabic: محمد محمد الأمير عوض السيد عطا Septem– September 11, 2001) was an Egyptian hijacker and the ringleader of the September 11 attacks in 2001 in which four United States airliners were commandeered with the intention of destroying specific civilian, military, and governmental targets. 1.8.Ringleader of the September 11 attacks as the hijacker- pilot of American Airlines Flight 11 Home: ~mateljan/arta/news.htm Download: Get ARTA Audio Measurement And Analysis Software v. The ARTA program is also a powerful analyzer of: Gated frequency response, Smoothed frequency response (in 1/n-octave bands), Step response, Impulse response envelope (ETC - curve), Cumulative spectral decay waterfall graphs and sonogram, Burst decay waterfall graphs and sonogram, Energy decay in reverberant environments, Room acoustical parameters, Directivity patterns, Speech intelligibility measures: MTF, STI, RASTI, %AL.

Two-channel voltage level meter and third octave analyzer With calibrated microphone, ARTA can be used as a virtual IEC class 1 SPL meter with a real time modes: Integrating SPL meter with 24 hours data logging, Octave SPL meter with noise rating (NR, NC, PNC, RC, NCB), Third octave SPL meter with report of specific loudness, loudness in sones and loudness level in phones. Triggered storage scope with spectrum and short-time Fourier analysis. Spectrum, octave band and THD analyzer with signal generators: sine, two sine, multitone, periodic square and triangle, white noise, pink noise, periodic white noise and periodic pink noise. Single channel Fourier analyzer with signal generators: periodic white noise and periodic pink noise. Dual channel Fourier analyzer with signal generators: white noise, pink noise, periodic white noise and periodic pink noise. The ARTA program has functions of following measurement systems: Impulse response measurement system with signal generators: periodic white noise, periodic pink noise, MLS, linear and logarithmic swept-sine. You can read ARTA as Audio Real Time Analysis, and also as Art for Audio. ARTA Audio Measurement And Analysis Software 1.8.2 | 8 Mb ARTA - program for the impulse response measurement and for real-time spectrum analysis and frequency response measurements.

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