In December 2020, the Senate Department for the Environment, Transport and Climate Protection published a new circular (Circular I NR. 04/2020) on the topic of determining noise emissions and immissions from bar forecourts. The circular applies to the approximate determination of noise emissions and immissions caused at night by open-air restaurants, in particular by pub forecourts within the meaning of Section 10 (2) of the Berlin State Immission Control Act. One of the significant changes relates to the fact that Delta Li is only determined for the total number of persons and not for each partial area. The circular is to be published in the circular database (https://www.berlin.de/politik-und-verwaltung/rundschreiben/) of the State of Berlin, here you will also find further information.