{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:OW6JU5U2YG2TUXFGWTGQZIZLAK","short_pith_number":"pith:OW6JU5U2","canonical_record":{"source":{"id":"1709.07269","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2017-09-21T11:46:14Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"e695e2f51d32932188d622153c0935631f20c7b5051217f3c47ab99c4674486d","abstract_canon_sha256":"8fe4b7589ab3a9769d3cddfae3c73068195185a29b292992af3b5605c5d14488"},"schema_version":"1.0"},"canonical_sha256":"75bc9a769ac1b53a5ca6b4cd0ca32b02bdca1a48053ae2725415e8b2d0b73472","source":{"kind":"arxiv","id":"1709.07269","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.07269","created_at":"2026-05-18T00:19:26Z"},{"alias_kind":"arxiv_version","alias_value":"1709.07269v3","created_at":"2026-05-18T00:19:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.07269","created_at":"2026-05-18T00:19:26Z"},{"alias_kind":"pith_short_12","alias_value":"OW6JU5U2YG2T","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OW6JU5U2YG2TUXFG","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OW6JU5U2","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:OW6JU5U2YG2TUXFGWTGQZIZLAK","target":"record","payload":{"canonical_record":{"source":{"id":"1709.07269","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2017-09-21T11:46:14Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"e695e2f51d32932188d622153c0935631f20c7b5051217f3c47ab99c4674486d","abstract_canon_sha256":"8fe4b7589ab3a9769d3cddfae3c73068195185a29b292992af3b5605c5d14488"},"schema_version":"1.0"},"canonical_sha256":"75bc9a769ac1b53a5ca6b4cd0ca32b02bdca1a48053ae2725415e8b2d0b73472","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:19:26.743115Z","signature_b64":"EG2QuejOUE7CgUNdmpmYcL5SZSmkPjWN00PndPWOdxWJs6jFHgEbMbrIDSmhWP9jgkdHO0pwxUSVquBMRDqMAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"75bc9a769ac1b53a5ca6b4cd0ca32b02bdca1a48053ae2725415e8b2d0b73472","last_reissued_at":"2026-05-18T00:19:26.742588Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:19:26.742588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1709.07269","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:19:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"saC6HEpMC1NSzuBSKbZQYXYGG55DX+2XAJdJtppW5dbgcIR3CMLy5Sj71YnyiOSGXHniDqQY+SdBZgM+PIC+Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T19:52:15.363422Z"},"content_sha256":"ecf9afb4e450400a8dd1d3d5b09fbb5910a4f7bb2d30d420970c09fa3c3eba5c","schema_version":"1.0","event_id":"sha256:ecf9afb4e450400a8dd1d3d5b09fbb5910a4f7bb2d30d420970c09fa3c3eba5c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:OW6JU5U2YG2TUXFGWTGQZIZLAK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Broadband Multizone Sound Rendering by Jointly Optimizing the Sound Pressure and Particle Velocity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SD"],"primary_cat":"eess.AS","authors_text":"Christian Hofmann, Michael Buerger, Walter Kellermann","submitted_at":"2017-09-21T11:46:14Z","abstract_excerpt":"In this paper, a recently proposed approach to multizone sound field synthesis, referred to as Joint Pressure and Velocity Matching (JPVM), is investigated analytically using a spherical harmonics representation of the sound field. The approach is motivated by the Kirchhoff-Helmholtz integral equation and aims at controlling the sound field inside the local listening zones by evoking the sound pressure and particle velocity on surrounding contours. Based on the findings of the modal analysis, an improved version of JPVM is proposed which provides both better performance and lower complexity. I"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.07269","kind":"arxiv","version":3},"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":"2026-05-18T00:19:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QSBiLgkN5GD0LK6Idtt6sjyAZuCZWLPeDrBM6kU8I90GNh1wy0jptS7KuBKoLc5jR/DcAAyQK2/bBf8uVvJtDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T19:52:15.363928Z"},"content_sha256":"656062bcd3ead0b9b106d4065ff26297eb58a8889d93b24a1564488bdca2b46b","schema_version":"1.0","event_id":"sha256:656062bcd3ead0b9b106d4065ff26297eb58a8889d93b24a1564488bdca2b46b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OW6JU5U2YG2TUXFGWTGQZIZLAK/bundle.json","state_url":"https://pith.science/pith/OW6JU5U2YG2TUXFGWTGQZIZLAK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OW6JU5U2YG2TUXFGWTGQZIZLAK/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":"2026-06-24T19:52:15Z","links":{"resolver":"https://pith.science/pith/OW6JU5U2YG2TUXFGWTGQZIZLAK","bundle":"https://pith.science/pith/OW6JU5U2YG2TUXFGWTGQZIZLAK/bundle.json","state":"https://pith.science/pith/OW6JU5U2YG2TUXFGWTGQZIZLAK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OW6JU5U2YG2TUXFGWTGQZIZLAK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:OW6JU5U2YG2TUXFGWTGQZIZLAK","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":"8fe4b7589ab3a9769d3cddfae3c73068195185a29b292992af3b5605c5d14488","cross_cats_sorted":["cs.SD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2017-09-21T11:46:14Z","title_canon_sha256":"e695e2f51d32932188d622153c0935631f20c7b5051217f3c47ab99c4674486d"},"schema_version":"1.0","source":{"id":"1709.07269","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1709.07269","created_at":"2026-05-18T00:19:26Z"},{"alias_kind":"arxiv_version","alias_value":"1709.07269v3","created_at":"2026-05-18T00:19:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.07269","created_at":"2026-05-18T00:19:26Z"},{"alias_kind":"pith_short_12","alias_value":"OW6JU5U2YG2T","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"OW6JU5U2YG2TUXFG","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"OW6JU5U2","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:656062bcd3ead0b9b106d4065ff26297eb58a8889d93b24a1564488bdca2b46b","target":"graph","created_at":"2026-05-18T00:19:26Z","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":"In this paper, a recently proposed approach to multizone sound field synthesis, referred to as Joint Pressure and Velocity Matching (JPVM), is investigated analytically using a spherical harmonics representation of the sound field. The approach is motivated by the Kirchhoff-Helmholtz integral equation and aims at controlling the sound field inside the local listening zones by evoking the sound pressure and particle velocity on surrounding contours. Based on the findings of the modal analysis, an improved version of JPVM is proposed which provides both better performance and lower complexity. I","authors_text":"Christian Hofmann, Michael Buerger, Walter Kellermann","cross_cats":["cs.SD"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2017-09-21T11:46:14Z","title":"Broadband Multizone Sound Rendering by Jointly Optimizing the Sound Pressure and Particle Velocity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.07269","kind":"arxiv","version":3},"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:ecf9afb4e450400a8dd1d3d5b09fbb5910a4f7bb2d30d420970c09fa3c3eba5c","target":"record","created_at":"2026-05-18T00:19:26Z","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":"8fe4b7589ab3a9769d3cddfae3c73068195185a29b292992af3b5605c5d14488","cross_cats_sorted":["cs.SD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2017-09-21T11:46:14Z","title_canon_sha256":"e695e2f51d32932188d622153c0935631f20c7b5051217f3c47ab99c4674486d"},"schema_version":"1.0","source":{"id":"1709.07269","kind":"arxiv","version":3}},"canonical_sha256":"75bc9a769ac1b53a5ca6b4cd0ca32b02bdca1a48053ae2725415e8b2d0b73472","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75bc9a769ac1b53a5ca6b4cd0ca32b02bdca1a48053ae2725415e8b2d0b73472","first_computed_at":"2026-05-18T00:19:26.742588Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:26.742588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EG2QuejOUE7CgUNdmpmYcL5SZSmkPjWN00PndPWOdxWJs6jFHgEbMbrIDSmhWP9jgkdHO0pwxUSVquBMRDqMAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:26.743115Z","signed_message":"canonical_sha256_bytes"},"source_id":"1709.07269","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ecf9afb4e450400a8dd1d3d5b09fbb5910a4f7bb2d30d420970c09fa3c3eba5c","sha256:656062bcd3ead0b9b106d4065ff26297eb58a8889d93b24a1564488bdca2b46b"],"state_sha256":"95f7fa0c70cad179a3bab4b67f5c9695039f5757226136a7cb6f027d0f2b2b1c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j/R1R5K5o5F5dy0Q1CAp0OqFX0gG/SMe7erR3yt49dDBB3yDaWStyzhGlOCk6qtDKPI6OYuWQa7+1nqGrZFAAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T19:52:15.366578Z","bundle_sha256":"b8cff50b9db73b845780be3c21427a3df453d03c99d3a163f9ed3e7a2a885fd7"}}