But pitch differs from loudness, which is measured in decibels: a long-range acoustic device can produce 160 decibels, and sounds over 120 can cause permanent hearing damage even during a short exposure. *https://www.theguardian.com/us-news/2026/jul/09/california-universities-military-equipment <https://www.theguardian.com/us-news/2026/jul/09/california-universities-military-equipment>*
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