Sine Bursts (20Hz-200Hz)

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, this file 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.

Usage

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.

20Hz	21Hz	22Hz	23.5Hz	25Hz	26.5Hz	28Hz	30Hz
31.5Hz	33Hz	60Hz	56Hz	53Hz	50Hz	47Hz	44Hz
42Hz	40Hz	37Hz	35Hz	63Hz	67Hz	71Hz	75Hz
80Hz	85Hz	90Hz	95Hz	100Hz	106Hz	200Hz	185Hz
170Hz	160Hz	150Hz	142Hz	134Hz	126Hz	120Hz	112Hz

Links

• Room acoustics @ U. of Salford
• Room modes crash course
• Room Mode Calculator