{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:HBCLU2TSPV552FKV3YW6J35Y5O","short_pith_number":"pith:HBCLU2TS","schema_version":"1.0","canonical_sha256":"3844ba6a727d7bdd1555de2de4efb8eb8028088ac37db7967f27345ec05bfbae","source":{"kind":"arxiv","id":"1810.02892","version":1},"attestation_state":"computed","paper":{"title":"MEMS approach to low-frequency broadband acoustic metamaterials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Gaofeng Wang, Lixiang Wu, Qifa Zhou, Quansheng Sun","submitted_at":"2018-10-05T21:33:43Z","abstract_excerpt":"We experimentally demonstrate a simple micro-electro-mechnical systems (MEMS) approach to acoustic metamaterials and have observed the average increase of nearly 6 dB beyond the classic law for sound attenuation at low frequencies from 200 Hz to 1200 Hz. Here, we have also found that the MEMS metastructure, especially the cavity-backed micromembrane, contributes to 22.3% gain of sound transmission loss (STL) with a fill factor of perforation of less than 7.6%."},"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":"1810.02892","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-10-05T21:33:43Z","cross_cats_sorted":[],"title_canon_sha256":"c051b6b17665d8028f33779a7d545e57aa829f4d31eff8124f326a03382626b5","abstract_canon_sha256":"e80a7b7f77ecbf1b3f1baba016c4587c95a9c57596e8d656d0b17bf69b6b9990"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:03:59.959338Z","signature_b64":"cyRe77uuXljx2v+Vq0eQAEhTV5BEJFC+U3WS1UFQVrpBVwn9qiSgF8yQVyQ4wEzM+/+cEz5+sthhHDFVmJHdBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3844ba6a727d7bdd1555de2de4efb8eb8028088ac37db7967f27345ec05bfbae","last_reissued_at":"2026-05-18T00:03:59.958640Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:03:59.958640Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"MEMS approach to low-frequency broadband acoustic metamaterials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Gaofeng Wang, Lixiang Wu, Qifa Zhou, Quansheng Sun","submitted_at":"2018-10-05T21:33:43Z","abstract_excerpt":"We experimentally demonstrate a simple micro-electro-mechnical systems (MEMS) approach to acoustic metamaterials and have observed the average increase of nearly 6 dB beyond the classic law for sound attenuation at low frequencies from 200 Hz to 1200 Hz. Here, we have also found that the MEMS metastructure, especially the cavity-backed micromembrane, contributes to 22.3% gain of sound transmission loss (STL) with a fill factor of perforation of less than 7.6%."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.02892","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1810.02892","created_at":"2026-05-18T00:03:59.958734+00:00"},{"alias_kind":"arxiv_version","alias_value":"1810.02892v1","created_at":"2026-05-18T00:03:59.958734+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.02892","created_at":"2026-05-18T00:03:59.958734+00:00"},{"alias_kind":"pith_short_12","alias_value":"HBCLU2TSPV55","created_at":"2026-05-18T12:32:28.185984+00:00"},{"alias_kind":"pith_short_16","alias_value":"HBCLU2TSPV552FKV","created_at":"2026-05-18T12:32:28.185984+00:00"},{"alias_kind":"pith_short_8","alias_value":"HBCLU2TS","created_at":"2026-05-18T12:32:28.185984+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/HBCLU2TSPV552FKV3YW6J35Y5O","json":"https://pith.science/pith/HBCLU2TSPV552FKV3YW6J35Y5O.json","graph_json":"https://pith.science/api/pith-number/HBCLU2TSPV552FKV3YW6J35Y5O/graph.json","events_json":"https://pith.science/api/pith-number/HBCLU2TSPV552FKV3YW6J35Y5O/events.json","paper":"https://pith.science/paper/HBCLU2TS"},"agent_actions":{"view_html":"https://pith.science/pith/HBCLU2TSPV552FKV3YW6J35Y5O","download_json":"https://pith.science/pith/HBCLU2TSPV552FKV3YW6J35Y5O.json","view_paper":"https://pith.science/paper/HBCLU2TS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1810.02892&json=true","fetch_graph":"https://pith.science/api/pith-number/HBCLU2TSPV552FKV3YW6J35Y5O/graph.json","fetch_events":"https://pith.science/api/pith-number/HBCLU2TSPV552FKV3YW6J35Y5O/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HBCLU2TSPV552FKV3YW6J35Y5O/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HBCLU2TSPV552FKV3YW6J35Y5O/action/storage_attestation","attest_author":"https://pith.science/pith/HBCLU2TSPV552FKV3YW6J35Y5O/action/author_attestation","sign_citation":"https://pith.science/pith/HBCLU2TSPV552FKV3YW6J35Y5O/action/citation_signature","submit_replication":"https://pith.science/pith/HBCLU2TSPV552FKV3YW6J35Y5O/action/replication_record"}},"created_at":"2026-05-18T00:03:59.958734+00:00","updated_at":"2026-05-18T00:03:59.958734+00:00"}