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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"t60_impulse estimation fails for octave bands up to 16kHz with fs=44100Hz","articleBody":"Example code:\r\n```py\r\nfrom acoustics import room, bands\r\nt60 = room.t60_impulse(file, bands.octave(31.25, 16e3), \"t30\")\r\n```\r\nAn error raised `ValueError: Digital filter critical frequencies must be 0 \u003c Wn \u003c 1`, which happens at the last frequency band\r\n\r\nhttps://github.com/python-acoustics/python-acoustics/blob/3147c6f579e4de5dbf60ba15ae7381cf1a84e0b1/acoustics/room.py#L169-L171\r\n\r\n`octave_high()` gives the largest element of `high` is 22627.41699797, which is out of range of Nyquist at 44100Hz. That results in the `ValueError` in\r\nhttps://github.com/python-acoustics/python-acoustics/blob/3147c6f579e4de5dbf60ba15ae7381cf1a84e0b1/acoustics/room.py#L198\r\n\r\nIt may be better to check the frequency range in `octave_high` and `third_high` or just after they are called.","author":{"url":"https://github.com/happyTonakai","@type":"Person","name":"happyTonakai"},"datePublished":"2023-05-25T06:50:21.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/262/python-acoustics/issues/262"}