Parametric Loudspeaker Acoustics PhD: Measuring and Modelling Flat and Curved Loudspeakers

Parametric Loudspeaker Acoustics PhD: Measuring and Modelling Flat and Curved Loudspeakers

CharPAL is worth a targeted application from a candidate who wants to connect acoustic experiments with wave modelling. Its strongest evidence is the named supervisory team, an unusually relevant measurement environment, and recent work on parametric loudspeakers. University prestige alone is a weaker reason to choose it. The offer is one full-time FPI predoctoral position at La Salle–FUNITEC in Barcelona, with the doctorate at Universitat Ramon Llull (URL). The advertised deadline is 1 December 2026, 14:00 CET, equivalent to 21:00 Beijing time. Actual commencement, the personal fee bill and the allocation of the shared research-stay budget still need confirmation.

Research question and concrete work

A parametric acoustic loudspeaker generates audible sound through nonlinear propagation of ultrasound. The doctoral problem is to explain and predict the resulting sound field efficiently, especially beyond simple idealised conditions. A useful thesis needs agreement between the physical picture, spatial measurements and predictive calculations, rather than only an attractive audio demonstration.

The advertised work starts with experimental characterisation of flat and curved sources and three-dimensional field measurement. Pressure, particle velocity, intensity and impedance are related but different observables: a pressure map alone does not verify all of them. Robotic scanning and near-field acoustic holography help connect spatial observations to an inferred source representation. Equivalent-source and semi-analytical approaches aim to make the nonlinear problem more tractable; the thesis will need to establish where these approximations remain useful and how well they predict measurements. Prototype design, additive manufacturing and experimental validation are also within scope.

Two application routes test that foundation. For heritage, localised, approximately plane-wave excitation is intended to help characterise absorption and scattering without invasive sampling; site permissions, surface variability and real-room reflections can complicate interpretation. For packaging waste, acoustic responses and classification offer an alternative sensing route, but shape, position, background noise and environmental change may challenge generalisation. These are intended research uses, not guaranteed industrial products or proven damage-free operation on every object. An applicant should ask which route is the principal thesis commitment and what constitutes a feasible minimum outcome if the second route proves difficult.

The strongest technical preparation is therefore evidence of handling measurements, wave physics, inverse problems or predictive-model validation. A candidate can explain the difference between model fit and independent validation, how measurement uncertainty affects interpretation, and what a failed prediction teaches. No particular software package beyond the advertised examples should be made an invented compulsory entry condition.

University, degree and training

La Salle is a constituent institution of URL. CharPAL names URL’s doctorate in Information Technologies and their Application in Management, Architecture and Geophysics. The programme is jointly organised by La Salle and the Ebro Observatory; this does not make a different university the degree awarder or relocate the advertised Barcelona job to Roquetes. Its broad title accommodates the acoustics research line. Twenty annual programme places are not twenty funded CharPAL positions. Programme.

For institutional context, the publishers report URL at joint 474th in QS 2027 and in the 801–1000 band in THE 2027. These use different methods and are university-wide signals. The university’s January 2026 news describes Engineering as first among Spanish private universities in THE’s subject results; it does not establish first place across Spain or a global acoustics rank. The specialist laboratory and direct papers are stronger evidence of project fit than the broad rankings. QS, THE, subject context.

The full-time academic limit is four years. The programme requires a first-year research and training plan, an updated doctoral activities record and positive annual progress evaluation; a negative decision leads to reassessment within six months. Doctoral weeks support writing, presentation and research skills. A compendium thesis has its own publication rules, which should not be presented as a compulsory three-paper requirement for every student. Annual registration remains necessary. The degree clock, employment dates and any extension funding must be aligned individually. Training, continuity rules.

Supervisors, lab and recent papers

The offer explicitly names Marc Arnela and Oriol Guasch as joint supervisors. Arnela’s directory identifies him as profesor titular and head of the Acoustics Laboratory, working on computational acoustics, parametric loudspeakers and heritage-room acoustics. Guasch is a full professor, heads HER and brings computational acoustics, numerical methods and vibroacoustics expertise. Their combination fits measurement plus modelling; it does not establish who will provide daily supervision or how meetings will be divided. Arnela, Guasch.

IASLab’s Acoustics Laboratory documents an anechoic chamber with robotic microphone measurement, a reverberation chamber and acoustic computing software. These are directly relevant to field mapping and validation. Availability for this student, instrument training and access to particle-velocity measurements need discussion. HER’s consolidated-group recognition supplies additional regional context, although the 2023 announcement is not a current independent quality audit. Facilities, HER recognition.

Four recent primary publications clarify the research opportunity:

1. Arnela et al., Waste Management 204, 114934 (2025): Arnela is first and corresponding author. Acoustic responses and machine learning distinguished packaging materials in a controlled proof of concept. The reported accuracy above 90% belongs to that setting; it does not establish performance on a noisy industrial line, unseen packaging or changed environments. It directly supports the proposed waste application while leaving transfer and validation questions open. Primary abstract and authors.

2. Arnela, Burbano-Escolà, Scoczynski Ribeiro and Guasch, Applied Acoustics229,110414 (2025): both proposed supervisors coauthored a study of room reverberation and absorption using an omnidirectional parametric loudspeaker. Lower-frequency signal-to-noise difficulties and ultrasonic attenuation matter for interpreting measurements. This is a bridge to material characterisation, not evidence that every heritage surface can already be measured reliably. Primary abstract.

3. Fantinelli and Arnela, Forum Acusticum/EuroNoise 2025, DOI 10.61782/fa.2025.0405: comparisons of flat and curved prototypes show geometry-, frequency- and distance-dependent fields. The conference paper identifies near-field acoustic holography as future work. It supports a genuine measurement/model gap rather than a completed reconstruction system. Arnela is corresponding author; the byline alone does not allocate each author’s experimental work. Paper.

4. Fantinelli, Arnela, Brandão and Fernandez-Grande, Forum Acusticum/EuroNoise 2025, DOI 10.61782/fa.2025.0050: robotic spatial scanning provides a foundation for later reconstruction. The abstract describes first steps, so full three-dimensional inversion should not be treated as already solved. The external coauthors indicate an academic network, not guaranteed secondments for the incoming student. Primary proceedings abstract.

The article-specific claims are bounded to two institution-deposited journal abstracts and authorship records, selected results and the conclusion of the flat/curved conference paper, and the full abstract of the robotic-scanning paper. They do not establish findings from raw data or full journal methods, and bylines do not establish individual CRediT contributions. Manuscripts listed as submitted are not published results. Author bibliography.

Salary, fees and Barcelona costs

The offer describes a temporary, full-time 37.5-hour week, an FPI predoctoral arrangement lasting up to four years, and indicative €25,456.10 annual gross pay, subject to applicable updates. Dividing by 12 gives about €2,121.34 before deductions as a budgeting calculation, not a verified monthly payslip or instalment schedule. Net pay, annual progression, initial contract length and renewal conditions are not confirmed.

An additional €7,000 total is intended for doctoral tuition and research stays. It is shared between these purposes; it is neither an annual personal supplement nor evidence that all tuition and travel will be covered. The doctoral admission page directs fee enquiries to secre@salleurl.edu. Obtain a written annual fee schedule, including any non-EU charges and administrative costs, then ask what remains for visits after tuition. A funded employment position can still have a personal funding gap.

La Salle’s student FAQ quotes €1,110–1,360 per month for Barcelona living costs, depending on housing and habits: €13,320–16,320 over 12 months by arithmetic. This is a general student estimate, not a current rental offer or an employed doctoral researcher’s net budget. Deposits, initial travel, residence procedures, fee shortfalls and unreimbursed visits require additional reserves. Do not subtract this range from gross pay and label the result savings. Fee enquiries and admission, institutional living-cost guide.

Eligibility and application

The vacancy seeks a relevant Master’s background such as acoustics, mechanical engineering, physics, aeronautical engineering or applied mathematics, a sound understanding of waves, interest in theory and experiments, and excellent English. Measurement, signal processing, numerical modelling, MATLAB/Python or inverse-problem experience is advantageous. The wording does not require prior mastery of every item or specify a verified IELTS/GPA threshold.

For a Chinese qualification outside the EHEA, the university must verify Master-equivalent academic level and access to doctoral study in the issuing country. The Spanish 300 ECTS route and the EHEA Level 7 route are alternative legal entry paths; they do not require an applicant to invent a direct conversion of Chinese credits. No automatic recognition or guaranteed admission follows from nationality. Ask which degree, transcript, doctoral-access evidence, translations and legalisation are required. The programme may prescribe complementary training. Official admission conditions.

Recruitment requires a detailed CV, preferably CVA format, and academic transcript, sent to joinlasalle@salleurl.edu before the stated deadline. Scientific/technical merit and mobility together carry 50 points, including 45 for scientific/technical contributions and 5 for mobility; fit carries another 50. The top three candidates after initial assessment are to have a face-to-face interview. Remote alternatives and travel reimbursement are not promised. A full proposal or recommendation letters were not listed as compulsory job attachments. Separate doctoral admission requires its own motivated application and interview; employment selection alone is not registration.

China-based candidates must also coordinate permission to live and work. The Spanish ministry’s August2026 research-authorisation guidance covers eligible third-country researchers and includes doctoral candidates, with contracts or hosting documentation and other conditions. Ask HR which route applies and who submits it. Generic student-visa advice does not settle an employed researcher’s case. Ministry guidance.

Career value and questions to settle

The transferable value lies in acoustic metrology, automated measurement, scientific programming, inverse modelling and explaining the limits of a prediction. Those skills can support acoustic engineering, testing and certification, audio-device R&D or further academic work. The programme reports alumni across engineering and R&D sectors, but publishes no CharPAL placement rate here. Local language requirements and the number of relevant vacancies remain unquantified; none of these paths is guaranteed. Programme careers.

Before committing, settle actual start and contract dates: the offer’s 27 October start entry precedes its 1 December deadline and is not a reliable onboarding date. The general January–February registration window may be relevant, but it is not an agreed individual start. Also request the fee/budget allocation, updated gross pay and instalments, Chinese-degree assessment and English evidence, interview logistics and research-authorisation timetable. On science, ask about the priority between applications, available instruments, day-to-day mentoring, realistic validation milestones, data/software rights and research-stay funding. Confirm that the named recruitment remains open before submitting.

Evidence and Sources

The linked programme, staff, facility, publication, ranking, cost and government pages support the associated statements. Financial figures from the vacancy remain indicative until confirmed in the individual offer.