Wirklich ein großartiges Flugzeug, auch abgesehen von den massiven technischen Problemen:

A problem for passengers was the very high noise level inside the cabin, measuring at least 90–95 dB on average. The noise came from the engines; unlike Concorde, it could only sustain supersonic speeds using afterburners continuously. In addition, the active heat insulation system used for the air conditioning, which used the flow of spent cabin air, was described as excessively noisy. Passengers seated next to each other could have a conversation only with difficulty, and those seated two seats apart could not hear each other even when screaming and had to pass hand-written notes instead. Noise in the rear of the cabin was described as unbearable

90-95 dB entsprechen dem Lärm einer Motorsäge oder lauten Maschinen. Diese Lautstärke ist bereits nach kurzer Zeit schädlich für das Gehör.