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www.akutek.info was launched 17.08.2006              Latest change 27.01.2012                         Latest NEWS;           E-mail: akutek@akutek.info

This site is dedicated to topics in room acoustics, music acoustics, speech acoustics, perception and their interrelation in general, and concert hall acoustics and stage acoustics in particular.

A Krokstad: "The hundred years cycle in room acoustic research and design"

Reverberation in a Small Room (with demo)

Phase-Space Diagrams for an Oscillator (animation)

Reflectors and canopies: Near Field scattering from a periodic array

What is a Wave? (with animation)

More….

Today:    
Room acoustical parameters at listeners’ ears—can concert hall preference be explained?  by M Skålevik

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AKUTEK Articles: Two-dimensional room acoustics

M Skålevik: Ratios of small rooms

H Azad:  Ali Qapu—Historical Persian music room

Westerkamp: Die Geige gestrichen und verglichen  (19MB); English introduction and summary: Sound of Science—108 violins talk

 

Dynamic article: Dynamic Directivity of musical instruments

 

M Skålevik: ASA Canopies

 

D Griesinger: Audibility of direct sound as a key to understand clarity of music and speech (paper) (presentation)

 

M Skålevik: Concert Hall Parameters and concert hall preference

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This week:
Simplified room acoustic measurements
by T Halmrast and A Buen

A balloon and a wav-recorder? 
As a client’s acoustical adviser, one often find that one needs to get more “short and easy” measurements of room acoustics, for classrooms, cantina, foyers etc. that might not need to fulfil the measurements standards. Also, we know that many sound technicians and home-studio owners would like measurements, but cannot afford the price of the standardized measuring equipment. Therefore easier, and cheaper software for measuring room acoustics are “free-ware” on the web. Which one should we thrust? For acoustically important halls, of course the measurements should follow the ISO standards.
”However, we find that the standards give that many (smaller) rooms are not measured, due to the cost of the heavy equipment needed.”
For an “overall” measurements of room acoustics, simple wav-file recordings of impulse sources like balloons analysed by a good room-acoustic software programme shows good results compared with measurements done in the same positions with more standard equipment.