What is the typical range of AF response in AM and FM military communications systems?

The typical range of audio frequency (AF) response in amplitude modulation (AM) and frequency modulation (FM) military communications systems is indeed 300Hz to 3kHz. This frequency range is considered optimal for voice transmission because it covers the essential frequencies for intelligibility in human speech, which typically resides between 300Hz and about 3kHz.

Using this range ensures that the communication systems can effectively transmit and receive the nuances and clarity of spoken language, which is crucial for military operations requiring accurate and clear communication. It allows for the optimal balance between bandwidth usage and signal quality in various operational environments. The frequencies outside of this range are less critical for intelligible speech and could result in unnecessary use of bandwidth, potentially affecting the overall efficiency of military communications.

Thus, the provided range aligns well with the recognized standards for military communication systems, confirming the answer as correct.