Program for calculating loudness according to DIN 45631 (ISO 532B)

Eberhard Zwicker, Hugo Fastl, Ulrich Widmann, Kenji Kurakata, Sonoko Kuwano, Sciichiro Namba

Research output: Contribution to journalArticlepeer-review

112 Citations (Scopus)


The method for calculating loudness level proposed by Zwicker is standardized in ISO 532B. This is a graphical procedure and it can be tedious to calculate loudness level by this procedure. Recently, DIN 45631 has been revised including a computer program for calculating loudness level in BASIC which runs on IBM-compatible PC's. Since the NEC PC-9801 series computers are popular in Japan, the program has been modified for the NEC PC-9801 series computers and is introduced in this paper.

Original languageEnglish
Pages (from-to)39-42
Number of pages4
JournalJournal of the Acoustical Society of Japan (E)
Issue number1
Publication statusPublished - 1991
Externally publishedYes


  • Loudness
  • Loudness level

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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