In sound measurement, which frequency range does a "Z" weighting network primarily cover?

The correct response highlights that a "Z" weighting network is designed to cover the frequency range from 20 Hz to 20,000 Hz. This is significant because the Z weighting is often referred to as the flat weighting, meaning it does not emphasize or de-emphasize any particular frequency in this range. This frequency response makes it particularly useful for obtaining an overall sound level measurement that reflects the actual sound environment across a wide range of audible frequencies.

The wide range of 20 Hz to 20,000 Hz corresponds with the typical human hearing range, allowing for an accurate representation of how we perceive sound in various environments. The ability to evaluate sound levels over this broad spectrum is critical in many applications, including noise assessments and environmental sound studies, where understanding the total sound profile is essential.

In contrast, the other options you provided cover narrower frequency bands that do not encompass the full range that Z weighting targets. This limitation would prevent those options from being as effective for comprehensive sound measurement.