Which frequency range typically limits voice-grade transmission of speech?

The frequency range that typically limits voice-grade transmission of speech is 300 Hz to 3400 Hz. This range is significant because it encompasses the fundamental frequencies and harmonics that are crucial for intelligible speech communication.

Speech contains most of its energy and critical information within this frequency band, enabling effective transmission and reception of voice signals in traditional telecommunications systems. This range includes key components essential for the understanding of phonemes and sibilance, which are vital for speech clarity.

Other frequency ranges, while they may carry sound, do not adequately capture the nuances and intelligibility of speech as effectively as the 300 Hz to 3400 Hz range does. For instance, the lower frequency range of 100 Hz to 2000 Hz might miss higher-pitched sounds that are integral for clear speech recognition, and ranges like 400 Hz to 800 Hz or 500 Hz to 6000 Hz extend beyond the essential limits, introducing frequencies that might not enhance voice transmission quality effectively for typical phone calls.