{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:IL7KOYRDQ6LJF3KOSJQHOKYQQM","short_pith_number":"pith:IL7KOYRD","canonical_record":{"source":{"id":"1702.07071","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2017-02-23T02:31:03Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"fc44ff20f4fc874602cfa07a004fa70291015c6a1e38886a0203d2dbaf307b1e","abstract_canon_sha256":"775c1cfa5514717df014d9010719abc7f8ad7b112a77d0713e4539d5140c45e0"},"schema_version":"1.0"},"canonical_sha256":"42fea76223879692ed4e9260772b10830f8f7d42822701ed4cb826cf1fd25c9d","source":{"kind":"arxiv","id":"1702.07071","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.07071","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"arxiv_version","alias_value":"1702.07071v1","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.07071","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"pith_short_12","alias_value":"IL7KOYRDQ6LJ","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IL7KOYRDQ6LJF3KO","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IL7KOYRD","created_at":"2026-05-18T12:31:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:IL7KOYRDQ6LJF3KOSJQHOKYQQM","target":"record","payload":{"canonical_record":{"source":{"id":"1702.07071","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2017-02-23T02:31:03Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"fc44ff20f4fc874602cfa07a004fa70291015c6a1e38886a0203d2dbaf307b1e","abstract_canon_sha256":"775c1cfa5514717df014d9010719abc7f8ad7b112a77d0713e4539d5140c45e0"},"schema_version":"1.0"},"canonical_sha256":"42fea76223879692ed4e9260772b10830f8f7d42822701ed4cb826cf1fd25c9d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:08.444343Z","signature_b64":"w8lZLTUqOYNY2gMExqkSRF6dT8adbyBFcM5Is4kq4JnnkXRDhPAQQv4CX4Z0txlmqG9l/ONJ+zO8fKPOmzlODw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"42fea76223879692ed4e9260772b10830f8f7d42822701ed4cb826cf1fd25c9d","last_reissued_at":"2026-05-18T00:50:08.443635Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:08.443635Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.07071","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4v3HreMGf8zr4NQ4PnrmR/j/yCzDO8nKOF/Cw5/alYRaC4Gx7YDqmmiecPlqG5y3MdTXmD+hdHmmmkB9hW8kCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:39:42.232563Z"},"content_sha256":"0a823099e48fa1c3fb1302291c01aec2a46ae33cd76c7b55a25c405160f6c27a","schema_version":"1.0","event_id":"sha256:0a823099e48fa1c3fb1302291c01aec2a46ae33cd76c7b55a25c405160f6c27a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:IL7KOYRDQ6LJF3KOSJQHOKYQQM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pronunciation recognition of English phonemes /\\textipa{@}/, /{\\ae}/, /\\textipa{A}:/ and /\\textipa{2}/ using Formants and Mel Frequency Cepstral Coefficients","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SD"],"primary_cat":"cs.CL","authors_text":"Keith Y. Patarroyo, Vladimir Vargas-Calder\\'on","submitted_at":"2017-02-23T02:31:03Z","abstract_excerpt":"The Vocal Joystick Vowel Corpus, by Washington University, was used to study monophthongs pronounced by native English speakers. The objective of this study was to quantitatively measure the extent at which speech recognition methods can distinguish between similar sounding vowels. In particular, the phonemes /\\textipa{@}/, /{\\ae}/, /\\textipa{A}:/ and /\\textipa{2}/ were analysed. 748 sound files from the corpus were used and subjected to Linear Predictive Coding (LPC) to compute their formants, and to Mel Frequency Cepstral Coefficients (MFCC) algorithm, to compute the cepstral coefficients. A"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.07071","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6S1WlgRD0Ri7UcE8KLBD5vMCU6FkfutJrsH0EcExIUJ9G5w8IYYG+HxUToYUukpWF4LMAhIxHm81Cq3KeuieDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:39:42.232917Z"},"content_sha256":"c7af3d19638d4b07e0cc78615d2af88f3b4b02e9041332cc7475407f9d039d8e","schema_version":"1.0","event_id":"sha256:c7af3d19638d4b07e0cc78615d2af88f3b4b02e9041332cc7475407f9d039d8e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IL7KOYRDQ6LJF3KOSJQHOKYQQM/bundle.json","state_url":"https://pith.science/pith/IL7KOYRDQ6LJF3KOSJQHOKYQQM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IL7KOYRDQ6LJF3KOSJQHOKYQQM/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T23:39:42Z","links":{"resolver":"https://pith.science/pith/IL7KOYRDQ6LJF3KOSJQHOKYQQM","bundle":"https://pith.science/pith/IL7KOYRDQ6LJF3KOSJQHOKYQQM/bundle.json","state":"https://pith.science/pith/IL7KOYRDQ6LJF3KOSJQHOKYQQM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IL7KOYRDQ6LJF3KOSJQHOKYQQM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:IL7KOYRDQ6LJF3KOSJQHOKYQQM","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"775c1cfa5514717df014d9010719abc7f8ad7b112a77d0713e4539d5140c45e0","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2017-02-23T02:31:03Z","title_canon_sha256":"fc44ff20f4fc874602cfa07a004fa70291015c6a1e38886a0203d2dbaf307b1e"},"schema_version":"1.0","source":{"id":"1702.07071","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.07071","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"arxiv_version","alias_value":"1702.07071v1","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.07071","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"pith_short_12","alias_value":"IL7KOYRDQ6LJ","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IL7KOYRDQ6LJF3KO","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IL7KOYRD","created_at":"2026-05-18T12:31:21Z"}],"graph_snapshots":[{"event_id":"sha256:c7af3d19638d4b07e0cc78615d2af88f3b4b02e9041332cc7475407f9d039d8e","target":"graph","created_at":"2026-05-18T00:50:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The Vocal Joystick Vowel Corpus, by Washington University, was used to study monophthongs pronounced by native English speakers. The objective of this study was to quantitatively measure the extent at which speech recognition methods can distinguish between similar sounding vowels. In particular, the phonemes /\\textipa{@}/, /{\\ae}/, /\\textipa{A}:/ and /\\textipa{2}/ were analysed. 748 sound files from the corpus were used and subjected to Linear Predictive Coding (LPC) to compute their formants, and to Mel Frequency Cepstral Coefficients (MFCC) algorithm, to compute the cepstral coefficients. A","authors_text":"Keith Y. Patarroyo, Vladimir Vargas-Calder\\'on","cross_cats":["cs.SD"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2017-02-23T02:31:03Z","title":"Pronunciation recognition of English phonemes /\\textipa{@}/, /{\\ae}/, /\\textipa{A}:/ and /\\textipa{2}/ using Formants and Mel Frequency Cepstral Coefficients"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.07071","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0a823099e48fa1c3fb1302291c01aec2a46ae33cd76c7b55a25c405160f6c27a","target":"record","created_at":"2026-05-18T00:50:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"775c1cfa5514717df014d9010719abc7f8ad7b112a77d0713e4539d5140c45e0","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2017-02-23T02:31:03Z","title_canon_sha256":"fc44ff20f4fc874602cfa07a004fa70291015c6a1e38886a0203d2dbaf307b1e"},"schema_version":"1.0","source":{"id":"1702.07071","kind":"arxiv","version":1}},"canonical_sha256":"42fea76223879692ed4e9260772b10830f8f7d42822701ed4cb826cf1fd25c9d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42fea76223879692ed4e9260772b10830f8f7d42822701ed4cb826cf1fd25c9d","first_computed_at":"2026-05-18T00:50:08.443635Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:08.443635Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w8lZLTUqOYNY2gMExqkSRF6dT8adbyBFcM5Is4kq4JnnkXRDhPAQQv4CX4Z0txlmqG9l/ONJ+zO8fKPOmzlODw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:08.444343Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.07071","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0a823099e48fa1c3fb1302291c01aec2a46ae33cd76c7b55a25c405160f6c27a","sha256:c7af3d19638d4b07e0cc78615d2af88f3b4b02e9041332cc7475407f9d039d8e"],"state_sha256":"c8f1f57966311970004aed13ffc69d37fc0600782a37a5981d128b3e7fa3cb56"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SE/i2C1LrDkWcZY3SzXhHGbZqk5PlSzh3Yiwci+aBPxRBxF/sb32FWt28W1q6hhpIHeFIgDSVDn7tVR/HIy1Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T23:39:42.235070Z","bundle_sha256":"1af3a923b19235962c80597189f9ab6960bc589decb376b21d02323054d6fb68"}}