A Hand-Crank Siren is a manually operated mechanical warning device that generates a loud alarm sound through a rotating siren mechanism. Unlike electric warning systems, it does not require external power supply and can operate through manual rotation.

The main components of a Hand-Crank Siren include a crank handle, rotating mechanism, air chamber, rotor, and sound outlet. When the handle is turned, the internal rotor rotates at high speed, creating airflow vibrations that produce a high-decibel warning signal.

Hand-Crank Sirens are commonly used in emergency warning systems, civil defense applications, outdoor alarm systems, and areas where electricity supply may be limited.

Reference

GB/T 7714格式

[1] Wagner R P. Guide to Test Methods, Performance Requirements, and Installation Practices for Electronic Sirens Used on Law Enforcement Vehicles[R]. National Institute of Standards and Technology, 2000.

[2] Fragoulis D K, Avaritsiotis J N. A Siren Detection System Based on Mechanical Resonant Filters[J]. Sensors, 2001, 1(4):121-137.

MLA格式

Wagner, Randall P. Guide to Test Methods, Performance Requirements, and Installation Practices for Electronic Sirens Used on Law Enforcement Vehicles. National Institute of Standards and Technology, 2000.

Fragoulis, Dimitris K., and John N. Avaritsiotis. “A Siren Detection System Based on Mechanical Resonant Filters.” Sensors, vol. 1, no. 4, 2001, pp. 121-137.

APA格式

Wagner, R. P. (2000). Guide to Test Methods, Performance Requirements, and Installation Practices for Electronic Sirens Used on Law Enforcement Vehicles. National Institute of Standards and Technology.

Fragoulis, D. K., & Avaritsiotis, J. N. (2001). A siren detection system based on mechanical resonant filters. Sensors, 1(4), 121–137.