SoundOff Signal LF Aftershock loud siren system (Rumbler)

SoundOff Signal's LF Aftershock is a low-frequency siren system that complements existing sirens and ensures more effective attention and faster response in traffic. The system produces deep, low-frequency sound waves (125 Hz - 1 kHz), which effectively pass through cars, windows, and building walls, being clearly perceptible even inside closed vehicles.

Operating principle

LF Aftershock works with existing sirens and activates automatically for short periods in critical situations, such as intersections and areas with heavy traffic. The low-frequency sound produces vibrations that drivers physically feel, significantly improving perceptibility even when vehicle windows are closed, the radio is playing, or conversations are taking place.

Technical data

• Power supply: 10–16 V DC
• Output power: 100 W
• Sound frequency: 125 Hz - 1 kHz
• Operating temperature: -40°C to +65°C
• Dimensions: 148mm x 94mm x 44mm

Effect and benefits

• Greater perceptibility in heavy traffic
• Physically perceptible vibration
• Faster and clearer reaction from other road users
• Effective road clearing for emergency vehicles