AIR INTAKE, NACELLE, PROPULSION ASSEMBLY AND AIRCRAFT WITH GROOVED LIP

The invention relates to an air inlet for an aircraft nacelle, comprising a lip (10) and a front frame that together form a duct with a D-shaped section receiving hot air, characterized in that: - the front frame is arranged in an advanced position inside the lip; - the lip has de-icing grooves (12), which communicate with the D-shaped section duct (2) and extend essentially downstream of the front frame, - downstream of the front frame, outside the de-icing grooves, the lip has perforated zones (13) provided with sound absorption holes (16), - the air inlet comprises a foil (11), which hermetically closes the de-icing grooves and is provided with sound absorption holes (17) facing the perforated zones, - the air inlet comprises acoustic panels (20) inside the lip (10) downstream of the front frame (1). [0002] The advanced position of the front frame, made possible by the presence of de-icing grooves that ensure de-icing of the lip downstream of the front frame, makes it possible to increase the acoustic treatment surface of the air inlet.