Reverberation (1)

The Music Telegraph | Text 2019/01/28 [13:29]

Reverberation (1)

The Music Telegraph| 입력 : 2019/01/28 [13:29]

▲ RT60 (Reverberation Time 60 dB)

© NTI Audio



 

Reverberation

 

 

Reverberation:

- Sum of all the audible reflections

- Early reflections + Reflections + Direct sound

 

 

 

The angle of incidence = the angle of reflection 

▲ © The Music Telegraph



 

 

Time is critical point in reverberation:

- RT60: Time it takes to drop 60 dB

 

 

 

HAAS says:

i) Localization (where the sounds come from)

ii) If delayed sound is at least 10 dB louder than original sound (direct sound), then human ears will lose their sense of localization

iii) GAP (delays between two sounds) - if delay time is more than 40 ms then human hear two sounds; if delay time is less than 35 ms then human hear one sound

 

 

 

Echo:

- Full cycle of reflection

- Flutter echo —> faster

- Can eliminate (echo) by controlling variation of absorption

 

 

*Natural reverbs (before 1930s: before reverb was invented) 

 

 

Spring Reverb:

- 'Fisher Space Expander'

- Good for guitar sounds

 

 

 

 

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