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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.