Sound Gallery - Siren

Wildland fire engine used at Santa Monica Mountains National Recreation Area in California

NPS Photo

• Siren

  
  

  Sound recording of a siren, Grand Teton National Park, Wyoming.

  Credit / Author:

  NPS

  Audio Transcript

  The sound of a siren as an emergency vehicle passes by.

Spectrogram of a siren. Spectrograms are graphs that visualize sounds. The brightness of the colors shows sounds’ amplitude (loudness) across different frequencies (pitches), shown from bottom to top, and over time, from left to right. The rising and falling frequencies of the siren are readily visible in this image, with the sound getting louder as the vehicle passes the recording device.

NPS

• Listen to more natural and human-made sounds recorded in national parks via the NPS Sound Gallery

• Learn more about what the National Park Service does to explore, understand, and protect the acoustic environment at Natural Sounds (U.S. National Park Service)