The influence of the medium in the propagation of the ultrasound field has also been studied. Highly resistive
media (mass transport effects) [28], organic solvents [29] and electrochemistry in acoustically emulsified media [30]
were also analyzed. This last subject has received a specific review [31]. In spite of the major part of this work has
been done at low frequencies (20 kHz), the influence of the high frequencies on the sonoelectrochemical processes
in aspects such as mass transport or surface effects have been analyzed [32]. Other specific aspects of the effect of
the coupling of the electrical and ultrasonic fields have been analyzed, for example, the sonochemical enhancement
of electrochemiluminescence [33], the low-temperature sonoelectrochemical processes [34], high pressure
sonoelectrochemistry [35] and also physicochemical aspects with the use of high performance techniques so-called
high speed voltammetry [36], adsorption of macromolecules [37] and the electrochemistry at the emitter surfaces
[38].