Questions & Answers about Við hlustum á útvarpið í bílnum á morgnana.
No—hlusta is normally used with a prepositional object in Icelandic: hlusta á + (object).
So you say hlusta á útvarpið (listen to the radio), not hlusta útvarpið.
In hlusta á X, the á-phrase is treated as the verb’s object and á governs the accusative in this idiom.
So útvarpið is accusative singular definite of útvarp (neuter).