Technophobia has no place in the concert hall

Two different sources determine the signature sound of a concert hall. One is the direct sound coming from the performer to the listener; the character of this sound depends on the technique of the musician and the natural tone of their instrument. The second sound source is indirect sound which comes to the listener as reverberation. The unique characteristics of this reflected sound - reverberation time, frequency range and loudness - determine whether a hall is acoustically 'good' or 'bad'. Since the late-19th century the characteristics of this critical reflected sound have been controlled by the use of hard reflective surfaces. For instance, in the much-lauded Elbphilharmionie 10,000 gypsum fiber acoustic panels line the auditorium's walls to manage the reflected sound. Today classical music is struggling with the problem of concert halls that are deemed sonically unacceptable such as the Barbican in London. Much attention has been focussed on effectively...