{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:4UCE3RWCTCGLFUV5O2CZH7SI7I","short_pith_number":"pith:4UCE3RWC","schema_version":"1.0","canonical_sha256":"e5044dc6c2988cb2d2bd768593fe48fa3eebb685f115d19454e9b81f89874721","source":{"kind":"arxiv","id":"1004.2570","version":4},"attestation_state":"computed","paper":{"title":"Noise control by sonic crystal barriers made of recycled materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Daniel Torrent, Francisco Cervera, Francisco Simon, Jose Sanchez-Dehesa, Suitberto Cabrera, Victor M. Garcia-Chocano","submitted_at":"2010-04-15T08:01:44Z","abstract_excerpt":"A systematic study of noise barriers based on sonic crystals made of cylinders that use recycled materials like absorbing component is here reported. The barriers consist of only three rows of perforated metal shells filled with rubber crumb. Measurements of reflectance and transmittance by these barriers are reported. Their attenuation properties result from a combination of sound absorption by the rubber crumb and reflection by the periodic distribution of scatterers. It is concluded that porous cylinders can be used as building blocks whose physical parameters can be optimized in order to d"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1004.2570","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-04-15T08:01:44Z","cross_cats_sorted":[],"title_canon_sha256":"bc35fc56ff300a75f1e37d2ca65b53c348303f2df2270c20553507dd701398ea","abstract_canon_sha256":"c1e5a966f49fbf28f9ede14a9700c204b3fed1627096966d8fe488e658735aaf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:19.683181Z","signature_b64":"/3jZ8q/DQos47Bmohq7T64P7dq9XJQL5nnUb43GXrC++PhnAqnek4O3i9Sf/d6h4X+zH8SzUkiBuE2cOTonjDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5044dc6c2988cb2d2bd768593fe48fa3eebb685f115d19454e9b81f89874721","last_reissued_at":"2026-05-18T00:49:19.682786Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:19.682786Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Noise control by sonic crystal barriers made of recycled materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Daniel Torrent, Francisco Cervera, Francisco Simon, Jose Sanchez-Dehesa, Suitberto Cabrera, Victor M. Garcia-Chocano","submitted_at":"2010-04-15T08:01:44Z","abstract_excerpt":"A systematic study of noise barriers based on sonic crystals made of cylinders that use recycled materials like absorbing component is here reported. The barriers consist of only three rows of perforated metal shells filled with rubber crumb. Measurements of reflectance and transmittance by these barriers are reported. Their attenuation properties result from a combination of sound absorption by the rubber crumb and reflection by the periodic distribution of scatterers. It is concluded that porous cylinders can be used as building blocks whose physical parameters can be optimized in order to d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.2570","kind":"arxiv","version":4},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1004.2570","created_at":"2026-05-18T00:49:19.682843+00:00"},{"alias_kind":"arxiv_version","alias_value":"1004.2570v4","created_at":"2026-05-18T00:49:19.682843+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.2570","created_at":"2026-05-18T00:49:19.682843+00:00"},{"alias_kind":"pith_short_12","alias_value":"4UCE3RWCTCGL","created_at":"2026-05-18T12:26:04.259169+00:00"},{"alias_kind":"pith_short_16","alias_value":"4UCE3RWCTCGLFUV5","created_at":"2026-05-18T12:26:04.259169+00:00"},{"alias_kind":"pith_short_8","alias_value":"4UCE3RWC","created_at":"2026-05-18T12:26:04.259169+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I","json":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I.json","graph_json":"https://pith.science/api/pith-number/4UCE3RWCTCGLFUV5O2CZH7SI7I/graph.json","events_json":"https://pith.science/api/pith-number/4UCE3RWCTCGLFUV5O2CZH7SI7I/events.json","paper":"https://pith.science/paper/4UCE3RWC"},"agent_actions":{"view_html":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I","download_json":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I.json","view_paper":"https://pith.science/paper/4UCE3RWC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1004.2570&json=true","fetch_graph":"https://pith.science/api/pith-number/4UCE3RWCTCGLFUV5O2CZH7SI7I/graph.json","fetch_events":"https://pith.science/api/pith-number/4UCE3RWCTCGLFUV5O2CZH7SI7I/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I/action/storage_attestation","attest_author":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I/action/author_attestation","sign_citation":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I/action/citation_signature","submit_replication":"https://pith.science/pith/4UCE3RWCTCGLFUV5O2CZH7SI7I/action/replication_record"}},"created_at":"2026-05-18T00:49:19.682843+00:00","updated_at":"2026-05-18T00:49:19.682843+00:00"}