Sir: If Derek Hodgson really received 150 decibels of applause ("Blackpool illuminated", 29 September), then the whole Labour Party would now be deaf. I think the loudest sound ever heard in the Royal Albert Hall was about 127dB from the Who rock group, until that record was broken by a decibel or so with Scriabin's Poem of Ecstasy played by a very large orchestra plus organ. Since the scale is logarithmic, an increase of 3dB corresponds to a doubling of sound intensity. I cannot believe that Mr Hodgson's applause was 200 times louder than the Who.
Please have your sound-level meter recalibrated.
PETER J GROVE