ERIC Number: EJ603475
Record Type: Journal
Publication Date: 2000
Reference Count: N/A
Ultrasonic Technology in Duress Alarms.
Lee, Martha A.
School Construction News, v3 n1 p22 Jan-Feb 2000
Provides the pros and cons of the most commonly used technologies in personal duress alarm systems in the school environment. Discussed are radio frequency devices, infrared systems, and ultrasonic technology. (GR)
Publication Type: Journal Articles
Education Level: N/A
Authoring Institution: N/A