A video has been created showing what laryngomalacia (floppy infant airway) looks like from the inside. Both normal infant airway as well as infant with moderately severe laryngomalacia is shown including audio.
Infants with laryngomalacia have what parents hear as a "squeaky" or "noisy" breathing, especially on inhalation. Although most infants outgrow this condition, some require surgical intervention (supraglottoplasty) due to failure to thrive, inadequate oxygenation, excessive work of breathing, etc.
For more info on laryngomalacia beyond the video as well as how it is treated, click here.