That is a very well-put question. The sound systems established for conference interpretation have been around for the better part of 80 or 90 years, and they are well established. There are professionals servicing these, professionals measuring the compliance of equipment with the best possible professional standards and also setting all the parameters. You have sound technicians, sound engineers, audiologists who are testing equipment at the manufacturers' sites, and the level of quality of this sort of equipment is much higher than ISO standards.
ISO standards are the absolute minimum, the bare minimum that is possible to be used in professional settings, and not even that is reached.
The administration officials have rightly pointed out that your House of Commons interpretation system, which I personally have not seen and cannot assess—I know that Bosch consoles are used, which are very good—is very good and complies with all requirements. However, the connection to the outside seems to be the issue, so dialing in through the Zoom platform is where the quality falls down.