Pressure auto-power spectrum of the total Horizon-AGN simulation in red compared to the signal coming from within one virial radius of different mass bin. The highest mass bin is in dark brown and corresponds to the mass bin 14 < log(M_v/M_⊙ h⁻¹) < 15, we then decrease of one dex for every curve until reaching the lowest mass bin in yellow, which corresponds to the mass bin log(M_v/M_⊙ h⁻¹) < 10.