Description: Technology Test Tone Sine Wave 440Hz 60 Seconds 0Db Loop.

Description: Technology Test Tone Sine Wave 1Khz 60 Seconds -18Db Loop.

Description: Technology Test Tone Square Wave 15Khz 60 Seconds 0Db Loop.

Description: Large Firecrackers, W Quick Multiple Explosions, Interior Perspective.

Description: Technology Test Tone Middle C Reference 261.63 60 Seconds -18Db Loop.

Description: St. Paul's School Bell - Rings 7 O'clock- Clock Tower.

Description: an extraordinary background ambience

Description: Structure Fire: Heavy Crackling Roar