4/9/2023 0 Comments Loudness equalization![]() ![]() All sounds were tested with and without a masking sound from tyre noise. ![]() A listening test was conducted (at Volvo Car Corporation) where the subjects compared the perceived loudness for each pair in an AB5 test. The pairs were loudness equalized with two different methods (Filter/ISO532B and FFT/ANSI S3.4-2007) in Head Acoustics ArtemiS. Eight signal sounds, divided into different pairs and anchors from a Volvo XC90 was used for the study. The aim was to evaluate if a loudness over time model could be used to improve the tuning process in the car compartment. ![]() Previous trial av Volvo Car Corporation have included dB(A)-weighting and ISO15006:2011 with unsatisfactory result. Measurements and trials with loudness models are well known for steady tones but rather unexplored when it comes to short, transient sounds, such as signals in the car. Loudness is defined as the perceived sound level rated between quiet to loud. An information signal should be perceived as equally loud as another information signal, even though they might be totally different in length, frequency content, etc. Modern signal sounds in cars are complex, varied and tonal making them hard to tune (set the play back level) between the signals so they are perceived as equally loud. 2016 (English) Independent thesis Basic level (professional degree), 10 credits / 15 HE credits Student thesis Abstract
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