Synergistic effect of hydrogen peroxide production and sonochemiluminescence under dual frequency ultrasound irradiation

► The largest inhibition was observed under the dual irradiation of 28/28 kHz. ► The largest enhancement was observed under the dual irradiation of 28/970 kHz. ► H2O2 formation followed the order of 584/584 > 584/970 > 28/970 ≈ 28/584 > 28/28 kHz.