I did and it just doesn't make any sense.
Where does the sound come from? Their answer is this.
"The acoustic signal of interest is generated by vibration of electronic components (capacitors and coils) in the voltage regulation circuit, as it struggles to maintain a constant voltage to the CPU despite the large fluctuations in power consumption caused by different patterns of CPU operations. "
The variable power load would very based on the instructions but we are not really interested in the instructions we are interested in the data. Doing an instruction on any data should cause the same power draw so how do they extract the data?
Then you have answer 8
"Individual CPU operations are too fast for a microphone to pick up, but long operations (e.g., modular exponentiation in RSA) can create a characteristic acoustic spectral signature over many milliseconds, and these can be detected. In the chosen-ciphertext key extraction attack, we carefully craft the inputs to RSA decryption in order to maximize the dependence of the spectral signature on the secret key bits."
So it can only work with some keys?
For the multi core issue CPUs have a single VCC so you have no idea what core is doing want if it is even possible to extract the pattern since the claim it is the power draw on the voltage regulators that cause the sound.
The summary really does not answer the questions. The idea that the sound can extract the data violates the Nyquist–Shannon sampling theorem. There should be no way a multi khz audio signal can carry the data of the exection of data at over 1 Ghz. Even the statement that they extract the key over half an hour is just illogical. How much data can a modern PC encrypt with half an hour execution time?