{"id":"2443c96f-3e16-47a0-bbd4-fcddef88f093","arxiv_id":"2606.08524","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":6.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":0,"one_line_summary":"Acoustic disguising unifies cloaking and holography as limits of one operation realized via immersive boundary conditions driven by homogeneous, scattering, or heterogeneous Green's functions, demonstrated in 3D FDTD simulations.","lead":"The paper proposes acoustic disguising as a single framework where cloaking and holography are limits of the same boundary-control operation using Green's functions. A smart generalist might read it for insight into practical 3D sound manipulation for hiding or transforming acoustic signatures.","discovery_kind":"unification","skeptic_critique":{"model":"grok-4.3","headline":"Immersive boundary driving assumes ideal actuation/sensing that simulations do not test for artifacts or real-time retrieval errors.","rationale":"Reader's weakest assumption directly identifies the realizability gap; simulations validate the mathematical construction but leave the physical-driving step untested, so the UNVERDICTED stance is unchanged.","tokens_in":1658,"tokens_out":269,"duration_ms":19214,"concrete_test":"Re-run the 3D FDTD cloaking case (homogeneous Green's driving) after adding 1% Gaussian noise and 5-sample delay to the boundary driving signals; if interior suppression falls below 20 dB or exterior scattering reappears above -30 dB, the ideal-driving assumption fails.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The central claim requires that homogeneous Green's functions exactly cancel arbitrary incident fields inside the surface (cloaking unknown objects broadband), scattering Green's functions exactly reproduce a target scatterer for any illumination, and heterogeneous versions swap identities. This holds only if the boundary can be driven with the precise time-domain signals derived from those Green's functions. The FDTD demonstrations use impulsive Green's functions under perfect conditions; they do not examine whether data-driven retrieval introduces phase/amplitude errors or whether actuator dynamics prevent exact cancellation for broadband or unknown incidents.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.3","summary":"The paper proposes 'acoustic disguising' as a unified framework treating cloaking and holography as limits of the same operation realized via immersive boundary conditions on a closed surface. Driving the boundary with homogeneous Green's functions is claimed to suppress arbitrary incident fields inside the volume for broadband cloaking of unknown objects; scattering Green's functions synthesize a target scatterer for arbitrary illuminations; and heterogeneous Green's functions transform one object's scattering signature into another's. The framework is demonstrated in 3D FDTD simulations using impulsive Green's functions, with data-driven retrieval suggested for real-time applications.","tokens_in":1773,"tokens_out":476,"duration_ms":11871,"significance":"If the central claims hold, the work offers a mathematically unified approach to acoustic cloaking, holography, and identity transformation with a direct path to experimental implementation via data-driven Green's function retrieval. Strengths include the conceptual unification and the emphasis on broadband, illumination-independent performance, which would be a notable advance if supported by rigorous derivations and non-idealized validation.","major_comments":[{"comment":"The central claims require that homogeneous Green's functions exactly cancel arbitrary incident fields inside the surface (cloaking) and that scattering/heterogeneous versions exactly reproduce or swap signatures for any illumination. However, the FDTD demonstrations rely on impulsive Green's functions under perfect conditions and do not test for phase/amplitude errors from data-driven retrieval or actuator dynamics, which directly undermines the load-bearing assumption of realizable exact driving for broadband/unknown incidents.","section":"Abstract and simulation description"},{"comment":"No equations, derivations, or error analysis are supplied to show how the Green's functions achieve exact suppression or synthesis; without these, it is impossible to verify whether the framework is parameter-free or internally consistent as stated.","section":"Abstract"}],"minor_comments":[{"comment":"Clarify the precise definition and computation of 'heterogeneous Green's functions' versus the homogeneous and scattering cases to avoid ambiguity in the framework description.","section":"Abstract"}],"recommendation":"major_revision","confidential_remarks":"The manuscript appears to be at an early conceptual stage with limited technical detail in the provided abstract; the applied-physics scope is appropriate but the work would benefit from expanded mathematical and validation sections before publication."},"author_rebuttal":{"model":"grok-4.3","summary":"We thank the referee for the constructive feedback. We address each major comment below and will revise the manuscript accordingly to strengthen the presentation of the framework.","responses":[{"response":"The simulations demonstrate the ideal case of the mathematical framework using impulsive Green's functions to establish the unification principle for cloaking, holography, and identity transformation. The manuscript positions data-driven retrieval as a suggested route to implementation rather than claiming that the presented simulations already incorporate non-ideal effects. We agree that an analysis of phase/amplitude errors and actuator dynamics would better support the path to broadband, illumination-independent performance. We will add a subsection discussing these practical considerations, their potential impact, and mitigation approaches.","revision_made":"yes","referee_comment":"[Abstract and simulation description] The central claims require that homogeneous Green's functions exactly cancel arbitrary incident fields inside the surface (cloaking) and that scattering/heterogeneous versions exactly reproduce or swap signatures for any illumination. However, the FDTD demonstrations rely on impulsive Green's functions under perfect conditions and do not test for phase/amplitude errors from data-driven retrieval or actuator dynamics, which directly undermines the load-bearing assumption of realizable exact driving for broadband/unknown incidents."},{"response":"The abstract summarizes the approach, while the body of the manuscript describes the roles of homogeneous, scattering, and heterogeneous Green's functions. To make the claims more verifiable as requested, we will insert explicit equations and derivations showing how these functions produce the suppression and synthesis effects, together with a concise error analysis confirming consistency under the stated conditions.","revision_made":"yes","referee_comment":"[Abstract] No equations, derivations, or error analysis are supplied to show how the Green's functions achieve exact suppression or synthesis; without these, it is impossible to verify whether the framework is parameter-free or internally consistent as stated."}],"tokens_in":1304,"tokens_out":400,"duration_ms":16261,"standing_objections":[]},"desk_editor":{"model":"grok-4.3","letter":"The central move is treating cloaking (homogeneous Green's functions to null the interior field) and holography (scattering Green's functions to match a target) as two ends of the same surface-driving scheme, with a heterogeneous mix for identity swapping. That unification is the actual novelty; prior work handled the two problems separately.\n\nThe simulations in 3D FDTD with impulsive Green's functions plus the data-driven retrieval step are concrete enough to show the idea can be coded and run. The abstract's claim that this opens a route to real-time 3D cloaking and cloning follows directly from the setup.\n\nThe soft spot is that everything rests on perfect boundary actuation and exact Green's functions. The FDTD tests use ideal conditions and do not probe phase/amplitude errors from retrieval, actuator dynamics, or unknown broadband incidents, so the practical gap between simulation and hardware remains untested. No equations appear in the abstract, which makes it hard to verify the cancellation or synthesis claims without the full derivations.\n\nThis is for people already working on transformation acoustics or immersive boundary methods who want a single framework to organize cloaking and holography experiments. A reader looking for immediately usable hardware recipes will find the paper thin.\n\nIt is coherent on its own terms and deserves a serious referee to check the math and any extra validation runs.","headline":"The paper frames cloaking and holography as limits of one Green's-function-driven boundary operation called acoustic disguising, shown in ideal 3D FDTD runs.","tokens_in":2233,"tokens_out":349,"would_cite":false,"duration_ms":13159,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.3","headline":"Cloaking and holography are two limits of acoustic disguising realized by driving a closed surface with Green's functions.","keywords":["acoustic cloaking","acoustic holography","Green's functions","immersive boundary conditions","acoustic disguising","wave manipulation","FDTD simulations"],"falsifier":"A measurement inside the enclosed volume showing that an incident broadband field remains unsuppressed after the boundary is driven with homogeneous Green's functions.","tokens_in":2556,"feed_emoji":"🔊","tokens_out":592,"duration_ms":17410,"temperature":0.7,"pith_summary":"The paper establishes that cloaking and holography are not separate tasks but opposite limits of one operation called acoustic disguising. This operation relies on immersive boundary conditions around a closed surface. Driving those conditions with homogeneous Green's functions removes any incident sound inside the volume to cloak objects. Driving them with scattering Green's functions instead creates a scatterer that matches a chosen target for any incoming sound. Using heterogeneous functions combines the effects to swap one object's acoustic signature for another's.","feed_headline":"Cloaking and holography emerge as limits of one acoustic operation","feed_subtitle":"Driving a closed surface with Green's functions hides objects or mimics others for any incoming sound.","key_machinery":"Immersive boundary conditions on a closed surface driven by homogeneous, scattering, or heterogeneous Green's functions.","core_discovery":"Driving the boundary with homogeneous Green's functions suppresses any incident field inside the enclosed volume and cloaks unknown objects broadband; driving it with scattering Green's functions synthesizes a holographic scatterer indistinguishable from a target for arbitrary illuminations. Combining the two, using heterogeneous Green's functions, replaces the scattering signature of one object with that of another, transforming its acoustic identity. The framework is shown in three-dimensional FDTD simulations driven by impulsive Green's functions, complemented by data-driven Green's-function retrieval.","pith_inferences":["The same boundary-driving approach could extend to electromagnetic or elastic waves.","Sensor arrays approximating the closed surface might enable adaptive disguising in changing environments.","The unification points to possible new designs for acoustic privacy systems or virtual sound fields."],"forward_implications":["Unknown objects inside the volume are cloaked from broadband incident fields.","Holographic scatterers can be synthesized that match a target object for arbitrary illuminations.","The scattering signature of one object can be replaced with that of another.","Real-time three-dimensional acoustic cloaking, holography, cloning, and disguising become feasible.","Data-driven retrieval of Green's functions supports practical implementation."],"fun_headline_variants":["Acoustic disguising merges cloaking and holography","Green's functions enable cloaking or holography on boundaries","Suppressing fields cloaks unknown objects broadband","Transforming acoustic identity with heterogeneous Green's functions"],"cache_read_input_tokens":2112,"weakest_assumption_plain":"Immersive boundary conditions on a closed surface can be physically realized and driven with the required Green's functions without artifacts.","fun_headline_variants_meta":{"raw":{"variants":["Acoustic disguising merges cloaking and holography","Green's functions enable cloaking or holography on boundaries","Suppressing fields cloaks unknown objects broadband","Transforming acoustic identity with heterogeneous Green's functions"]},"model":"grok-4.3","cost_usd":0.007304,"raw_usage":{"total_tokens":3247,"prompt_tokens":597,"num_sources_used":0,"completion_tokens":60,"cost_in_usd_ticks":73040500,"prompt_tokens_details":{"text_tokens":597,"audio_tokens":0,"image_tokens":0,"cached_tokens":64},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":2590,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":597,"tokens_out":60,"duration_ms":14640,"temperature":1.0,"reasoning_tokens":2590,"cache_read_input_tokens":64,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-06-27T17:38:14.426148+00:00","model_set":{"reader":"grok-4.3"},"falsifier":"A measurement inside the enclosed volume showing that an incident broadband field remains unsuppressed after the boundary is driven with homogeneous Green's functions.","supporting_citations":[],"review_version":1}