Sine Burst Tones (20-200 Hz)

Background

Sine bursts are repeated sinusoidal patterns, characterized by a sharp attack and decay. In a correctly damped room, these bursts will remain detailed and well separated independently from their frequency.

Applications

Similarly to the swept sine test, our next files can be used to determine resonant frequencies in your room. Resonance modes not only produce an uneven frequency response but also affect decay times. When a sound hits a resonance, the room will still resonate at that frequency after the initial sound disappeared. Decay times at those frequencies are thus longer than normal.

The sound files

               
20Hz 21Hz 22Hz 23.5Hz 25Hz 26.5Hz 28Hz 30Hz
               
47Hz 44Hz 42Hz 40Hz 37Hz 35Hz 33Hz 31.5Hz
               
50Hz 53Hz 56Hz 60Hz 63Hz 67Hz 71Hz 75Hz
               
120Hz 112Hz 106Hz 100Hz 95Hz 90Hz 85Hz 80Hz
               
126Hz 134Hz 142Hz 150Hz 160Hz 170Hz 185Hz 200Hz
Play back these files one by one. When you hit a room mode, the loudness will change and decay times will increase, resulting in a loss of clarity and definition.

If you hear any distortion, noises or rattling, check your loudspeaker first, then look for some object resonating in your listening room.

Files below 40 Hz will require fairly large subwoofers in order to play correctly!

For different frequency spacings, tone durations and burst shapes, take a look at wavTones.

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