The files in the archive relate to the frequency response data used in the graphical results presented in the paper "Ultrabroadband sound control with deep-subwavelength plasmacoustic metalayers" by Stanislav Sergeev, Romain Fleury, and Hervé Lissek. Data was recorded with the software: PULSE LabShop Fast Track Version 18.1.1.9 - 2014-01-16. File "alpha_absorption.txt" contains frequency response of absorption coefficient of active plasma metalayer tuned to 100% sound absorption (figure 3). First column - row number, second column - frequency in Hz, third column - magnitude. Files "R_04.txt", "R_07.txt", "R_09.txt" contain frequency response of complex reflection coefficient when plasma metalayer is tuned to various constant over frequency reflection coefficients (figure 4a). First column - row number, second column - frequency in Hz, third column - real part, fourth column - imaginary part. Files "R_04_0cm.txt", "R_04_05cm.txt", "R_04_10cm.txt", "R_04_15cm.txt" contain frequency response of complex reflection coefficient when plasma metalayer is tuned to constant over frequency reflection coefficient of magnitude 0.4 and different linearly changing phases (figure 4b). First column - row number, second column - frequency in Hz, third column - real part, fourth column - imaginary part. File "R_04_10cm.txt" was measured at 4 cm further plane. To be consistent with the other data, phase should be corrected by 4 cm shift.