Active Standard: E1007 - 13b
Noral Stuart pointed out several problems he discovered when writing his first E1007 report using the new revised standard. We believe the concept in both E336 and E1007 was that the measured sound pressure levels should be presented rounded to the nearest tenth of a dB and then the final results should be presented as integer values. The problem is that in the current version of E1007 the ISPL is both a measured sound pressure level and a final result. The changes below attempt to make it clear how the data should be presented. Also, there were some issues in presenting absorption and T60 data. The standard said to present absorption data as integers. This meant that if you presented in metric units you only had 2 significant figures but if you presented in English units you had 3 significant figures. We think 3 significant figures would be preferred in both units. The standard said to present T60 data to 2 significant figures. That meant to tenths of a second if the T60 is greater than 1 but to hundredths of a second if the T60 is less than 1. We think always reporting to hundredths of a second would be more consistent.
Keywordsabsorption normalized impact sound pressure level; apparent impact insulation class; impact sound insulation; impact sound pressure level; impact sound rating; normalized impact sound rating; reverberation time normalized impact sound pressure level; tapping machine;
Ballot Item Approved as E1007-2013A and Pending Publication