Apparatus for supplying oxygen to a vehicle user, and vehicle comprising such an apparatus

An apparatus for supplying oxygen to a pilot of an aircraft, comprising:

• a source of pressurized respiratory gas containing oxygen-enriched air;
• at least one mask provided for supplying gas to a respiratory track of the aircraft pilot;
• a flow-regulating and/or pressure-regulating unit comprising at least one inlet connected to the source and at least one outlet connected to the mask, the flow-regulating and/or pressure-regulating unit being configured to regulate a flow and/or a pressure of said respiratory gas delivered to said mask according to a respiratory demand of the aircraft pilot;
• at least one sensor measuring the pressure and/or the flow of said respiratory gas delivered to said mask;
• an electronic data storage and processing unit;
• and
• a display, for displaying a warning signal, connected to the electronic data storage and processing unit, wherein the electronic data storage and processing unit is configured to:
• receive pressure and/or flow measurements from the at least one sensor;
• calculate, from said measurements, a frequency of flows of said respiratory gas delivered to said mask that corresponds to a respiratory frequency of the aircraft pilot;
• compare said calculated frequency against a threshold frequency from which there is a risk of hypocapnia;
• when said calculated frequency is greater than said threshold frequency, control said display to generate an audible and/or visual and/or vibratory warning signal;
• and
• control said display to generate an acoustic emission of a periodic signal that has a frequency corresponding to a target frequency that is less than or equal to said threshold frequency.