Mime type not supported by Wavesurfer Embed (Beta) Report data quality issue on this page via GitHub Verticale tabs BasisProject: User Contributions RecordingDate Recorded: woensdag, juni 20, 2001Local time: 0:41 RightsLicense: CollectionsCollections: Notities Search phase calls are diagnostic for identification. These are short raising and falling frequency FM pulses that may or may not have the decreasing frequency FM pulses at a higher frequency.