P.S.
Traditional ionophone and EAL are very different devices essentially.
While using a single energy transfer principle. No similar Electric-Arc Loudspeakers device is not currently commercially produced, so compare them with ionophone - incorrectly.
1. EAL is not ozone generator.
2. The device is not using corona discharge.
3. Measurement of ozone at 1 meter does not exceed the background noise.
Valid for corona discharge is needed, one electrode and the second electrode - the environment. Therefore, approaching the second virtual electrode ionized gas (plasma) cools forming O3 in small quantities, which decays in a few minutes.
The EAL electric arc has no cold zones, as it has two electrodes, between which closed the flow of electrons in the ionized gas and heated to the same temperature, prevents the formation of O3. In addition, the air flow path of the catalyst has Horn.