Behzad Ranjbari (acoustician)

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Scientist

Behzad Ranjbari B. (born July 7, 1978) is an acoustics consultant specialized in design consulting for architectural acoustics with special emphasis on Concert Hall Acoustics and Stage Acoustics of small and large auditoria for voice and music. Behzad Ranjbari has been the recipient of The Acoustical Society of Sweden Award 2013[1][2] (Stockholm, Sweden) as well as The Acoustical Society of America (ASA) Award; The 2015 Robert B. Newman Award Medal for excellence in the study of acoustics and in its application to architecture.[3][4] Ranjbari is the founder of The BRL for Acoustics, founder and director of the CASPIM Center (Center for Acoustical Studies on the Performance of Iranian Music) and acoustics consultant and project leader at WSP Global Inc. in Sweden. In 2012, Behzad Ranjbari proposed two new acoustics parameters for the characterization of stage acoustics in concert halls, reflected in several publications including the journal of POMA (Proceedings of Meetings on Acoustics)[5] published by Acoustical Society of America (ASA) and the Svenska LjudBladet[6] published by Acoustical Society of Sweden in 2014. Behzad Ranjbari also has a parallel career as a musician and music mentor. He is also known for his sculptures and painting works.

Early Life and Education

Behzad Ranjbari was born on July 7, 1978 in Tehran, Iran. Encouraged by his father "Bahman Ranjbari" (Iranian architect), became familiar to Pre-Islamic, Islamic and contemporary architecture of Iran in his youth and assisted father in variety of tasks and assignments over the years. Since 1994, during 12 years learned the Traditional Repertoire of Persian Classical Music known as Radif first under "Mehran Moshgeri" at Maktab-Khaneh Mirza-Abdollah and later on under maestro Majid Kiani at Sarv-Setah Institute. From the very beginning of his music education, Ranjbari found himself deeply interested in the study of acoustics in relation to architecture and music. Prior to begin a university level, through some publications he was particularly acquainted with the research by Dr. Mehdi Barkeshli et al.,[7] carried out partly at Radio-Tehran and partly at the acoustics research laboratory of Faculty of Physics at University of Tehran. While he was looking for an opportunity to pursue an academic education in acoustics, he got the idea to pursue his under-graduate studies at the same institution as Dr. Mehdi Barkeshli at Faculty of Physics of University of Tehran to possibly work on the same topic at the same acoustics laboratory. Ranjbari soon joined the Physics program at University of Tehran, however realized that the acoustics research laboratory is not active anymore. Over his years of study at University of Tehran he took each and every chance to revive the acoustics research laboratory until 2001 in which he assisted Dr. Amir Masoud Abbasi to restart the acoustics laboratory, a laboratory in which a significant contribution of the musical acoustics/electroacoustics research in relation to Iranian music had been carried out. In 2002, Behzad succeeded to accomplish his B.Sc. project on ‘Investigation of electroacoustic methods applied to study of Iranian musical scales which later on reflected in "ART; Specialized Informative & Critical Monthly Review" in 2005.[8] In 2002, Behzad Ranjbari under-graduated from University of Tehran with the specialization in Solid State Physics & Acoustics. Holding a B.Sc. degree in Physics/Acoustics, between the years 2002 to 2008 Ranjbari managed to work for several acoustics research and development firms in Iran including Dept. of Research and Standards of Organisation for Development, Renovation and Equipping Schools of IR. Iran (DRES), NNM Consulting Engineers, The Noise, Vibration and Harshness Group of Dept. of New Products Design (NPD) at R&D of IKCO, etc. Ranjbari has been author of acoustics articles in several Iranian journals including: Professional monthly of Iran Construction Engineering Organisation (IRCEO),[9] Memar; Professional Bimonthly on Architecture and Urban Design,[10] ART: Specialized Informative & Critical Monthly Review[8], etc. Between 2005 to 2009, Ranjbari managed to attend several professional technical courses on advanced acoustics and Modal Analysis at Brüel & Kjær; Sound & Vibration Measurement A/S at Nærum, Denmark. In 2008 Ranjbari made an effort to include Architectural Acoustics to the list of Iran Construction Engineering Organisation (IRCEO) compulsory Building Engineering fields, however without success. Behzad Ranjbari got married in 2008 and moved to Sweden in 2009 to pursue his post-graduate studies in acoustics and further extend his competence.

File:Behzad Ranjbari at KTH Royal Institute of Technology - The MWL for Sound & Vibration Research.jpg
Behzad Ranjbari at KTH Royal Institute of Technology - The MWL for Sound & Vibration Research, Stockholm, Sweden

In 2009 Behzad Ranjbari joined the International Master's Program in Sound and Vibration at The Marcus Wallenberg Laboratory for Sound and Vibration Research (MWL) at KTH Royal Institute of Technology (Stockholm, Sweden) with the aim to further explore the realm of architectural acoustics and involved in a number of courses including: Acoustical Measurement, Experimental Structural Dynamics (ESD), Introduction to Noise and Vibration Control, Signal Analysis, Vibro-acoustics etc. however found that in spite of what the university claims, there are not so much opportunities to pursue architectural acoustics at KTH (Stockholm, Sweden). Therefore, Ranjbari took contact with Chalmers University of Technology (Gothenburg, Sweden) and learned about their architectural acoustics research, projects and courses and being fascinated by corresponding activities, immediately moved to gothenburg and joined their program in the Chalmers Room Acoustics Research Group (CRAG) at Chalmers University of Technology (Gothenburg, Sweden). At Chalmers while involving in a number of key courses including Room Acoustics, Building Acoustics and Community Noise, Psychoacoustics; Human Response to Sound & Vibration/ Sound Quality, etc. Behzad Ranjbari got the opportunity to within the framework of the Room Acoustics course attend the Acoustical Society of America Student Design Competition (ASASDC)[11] 2010 working on acoustical design of an opera house in Kansas City, Missouri, USA, providing acoustic consultancy to the architecture team as his first acoustical design project in architectural acoustics. In 2013, Ranjbari accomplished his Master's thesis project on: "New Metrics for the Characterization of Stage Acoustics in Concert Halls for Symphony Orchestras"[12]  which has been the winner of The Acoustical Society of Sweden Award 2013 (Stockholm, Sweden) as well as the Acoustical Society of America (ASA) Award; The 2015 Robert B. Newman Award Medal for excellence in the study of acoustics and in its application to architecture. Ranjbari hold his M.Sc. degree in Sound and Vibration with the specialisation in Architectural acoustics from Chalmers University of Technology in 2013.

Career

File:Behzad Ranjbari the recipient of the Acoustical Society of Sweden (SAS) Award 2013 at Award Ceremony Stockholm Sweden.jpg
Behzad Ranjbari the recipient of the Acoustical Society of Sweden (SAS) Award 2013 with the Acoustical Society of Sweden's president Hans Jonasson at award ceremony, March 20, 2014, Stockholm, Sweden.

Behzad Ranjbari, worked for several acoustics research and development firms before pursuing his post-graduate studies in acoustics. While beginning his post-graduate studies, he got the opportunity to be involved in a number of acoustics courses and course-projects at The Marcus Wallenberg Laboratory for Sound and Vibration Research (MWL) at KTH Royal Institute of Technology (Stockholm, Sweden) and at Chalmers Room Acoustics Research Group (CRAG) at Chalmers University of Technology (Gothenburg, Sweden), which provided him with the possibility to review and improve his previous proficiencies and further strengthen his competence. Ranjbari accomplished his master's degree in 2013 in Sound and Vibration with the specialisation in Architectural Acoustics from Chalmers University of Technology. At Chalmers, Ranjbari authored his Master's thesis report on "New Metrics for the Characterisation of Stage Acoustics in Concert Halls for Symphony Orchestras", which has been the winner of The Acoustical Society of Sweden Award 2013 (Stockholm, Sweden) for best Master's thesis in Sweden and winner of the Acoustical Society of America (ASA) Award; The 2015 Robert B. Newman Award Medal for excellence in the study of acoustics and in its application to architecture. In 2012, Ranjbari proposed two new acoustic parameters for the characterization of stage acoustics in concert halls for symphony orchestras and provided a review and severe criticism on the existing stage acoustics parameters in the standard ISO 3382[13]. Ranjbari's proposal of acoustics parameters has been reflected in several publications including the journal of POMA (Proceedings of Meetings on Acoustics) published by Acoustical Society of America (ASA) and the LjudBladet published by Acoustical Society of Sweden in 2014. In the same year (2012), Ranjbari was employed at the division of Applied Acoustics at Chalmers University of Technology as a project assistant. At the division of Applied Acoustics, beside contributing to a specific Room Acoustics project, Ranjbari as a project assistant was in charge of a couple of acoustics laboratories including the laboratory of "Audio Technology & Acoustics" as well as "Matter and Wave Theory", etc. Ranjbari established The BRL for Acoustics; the former partner of ÅF-Infrastructure AB in 2013, located in Gothenburg, Sweden, as an acoustics consulting firm having a range of fields of competence including: Architectural Acoustics (Room Acoustics & Building Acoustics), Psychoacoustics and Hearing, Concert Hall Acoustics and Stage Acoustics, Musical Acoustics, Industrial Noise as well as Noise and Vibration Control[14]. In the same year (2013) he established the CASPIM Center (Center for Acoustical Studies on the Performance of Iranian Music) which he runs it currently in his free time. Behzad Ranjbari received The Acoustical Society of Sweden Award in 2013. In 2015, Ranjbari received the Acoustical Society of America (ASA) Award; The 2015 Robert B. Newman Award Medal for excellence in the study of acoustics and in its application to architecture. In the same year (2015), Behzad joined the leading acoustics group at WSP Global Inc. in Gothenburg, Sweden.

Awards and Honors

File:Behzad Ranjbari ASA Award Robert Newman Medal 2015.jpg
Behzad Ranjbari the recipient of the Acoustical Society of America (ASA) Award: The 2015 Robert B. Newman Award Medal for Excellence in the Study of Acoustics and in its Application to Architecture.
  • The Acoustical Society of America (ASA) Award: The 2015 Robert B. Newman Award Medal for Excellence in the Study of Acoustics and in its Application to Architecture; Merit in Architectural Acoustics. Project Description: "New Metrics for the Characterization of Stage Acoustics in Concert Halls —for Symphony Orchestras".
  • The Acoustical Society of Sweden Award 2013, for best Master's Thesis in Sweden: for "New Metrics for the Characterization of Stage Acoustics in Concert Halls —for Symphony Orchestras"

Proposal of New Acoustics Parameters

Behzad Ranjbari carried out a number of acoustics laboratory simulations, psychoacoustical experiments as well as acoustical measurements on real stages and provided a review and severe criticism on the existing stage acoustics parameters in the standard ISO 3382[13]. In 2012 Ranjbari managed to propose a pair of joint acoustics parameters, namely GSelf and GOther (named by himself) as a replacement to the existing stage acoustics parameters in the standard ISO 3382[13], with the aim to assess the balance between the hearing of self and that of hearing others on concert hall stages, which has been reflected in several publications including the journal of POMA (Proceedings of Meetings on Acoustics) published by Acoustical Society of America (ASA) and the LjudBladet published by Acoustical Society of Sweden and has so far received the Acoustical Society of America (ASA) Award; The 2015 Robert B. Newman Award Medal for excellence in the study of acoustics and in its application to architecture as well as The Acoustical Society of Sweden] Award 2013. Among a number of reflections on Behzad Ranjbari's new proposed parameters, Professor Emeritus Asbjørn Krokstad; pioneer and the former president of the Acoustical Society of Norway wrote on Ranjbari's publication at the 163rd meeting of the Acoustical Society of America (ASA)—Acoustics 2012[15]:

“Excellent paper! I appreciate especially the great simplifications you introduce, and am convinced that the metrics give a reasonable indication on the influence of stage and room acoustics on the experience of the conditions for performers.” (Professor Emeritus Asbjørn Krokstad; pioneer and the former president of the Acoustical Society of Norway, Nov. 2012).[16]

Notable Projects

Behzad Ranjbari has so far contributed to more than 30 projects in design consulting for architectural acoustics as both acoustics consultant and project manager, providing design consultancy in the projects ranging from Performing Arts facilities to Hospitals, Preschools & Schools, Subway & Metro Stations, Courts of Justice, Train Stations, Offices/Workplaces, Sport Facilities, Residential, Indoor Swimming Pools, etc. In addition to this, he has so far contributed to a large number of NVH (Noise, Vibration and Harshness) testing and validation projects in the Automotive Industry. Ranjbari has also contributed to the area of Calibration of high-precision acoustical measurement instrumentations.

Music Background

File:Behzad Ranjbari Playing Persian Santur.jpg
Behzad Ranjbari Playing Persian Santur, Gothenburg, Sweden.

Since 1994, during 12 years Behzad Ranjbari learned the Radif Mirza-Abdollah of Persian Classical Music and Habib Somai's style of Santur-playing, first under "Mehran Moshgeri" at Maktab-Khaneh Mirza-Abdollah and later on under maestro Majid Kiani (musician, researcher, professor of Radif at University of Tehran and the former director of the music program at Fine Arts faculty of University of Tehran) at Sarv-Setah Institute. Behzad began his music career since 2004 first as a Radif instructor at Kannon-e Honar-e Iran (Tehran, Iran) and later on as a private Radif teacher in Iran (2005-2009) and in Sweden (2010 up to now). Since 2012 Ranjbari has collaborated with several theatre groups in Sweden as a voice and music mentor. Ranjbari co-founded the "House of Honar; Art and Cultural Association" in 2013 in Gothenburg, Sweden and served as a chairman between 2012 - 2017. Ranjbari has so far led a number of music workshops including series of choir workshops on Tasnif-Khani (Iranian traditional songs), series of workshops on Understanding of Radif Music as well as series of workshops on Criticism of Music, etc. Ranjbari has so far performed and contributed to a large number of recitals and music performances in Iran and Sweden since 2004. Ranjbari recently performed a recital of santur at Museum of World Culture (Sweden, 2013), performed recital of santur at Planeta Festival[17] (Sweden, 2014), etc. Since 2017 Ranjbari is performing a series of music performances called "SanturKväll med Behzad Ranjbari" (Santur Evening with Behzad Ranjbari) at architecturally/historically important public places in Sweden.

Musical Instrument Making Background

Since 1999, Behzad Ranjbari began learning the traditional style (Mehdi Nazemi's style) of making Santur under maestro M.R.Memarzadeh (Iranian santur maker) in Tehran, Iran and so far has made several Santur instruments under his supervision. Since the same year, Ranjbari and maestro M.R.Memarzadeh have conducted some research on Santur making.

Other Interests

Sculpture work by Behzad Ranjbari - Ref SA023
Painting work by Behzad Ranjbari - Ref PA011
Painting work by Behzad Ranjbari - Ref PA018

Abstract painting, Sculpture, Graphic design.

References

  1. "Svenska Akustiska Sällskapets pris för bästa examensarbete 2013". The Acoustical Society of Sweden’s quarterly: ‘Svenska Ljudbladet’ 2014(1). Spring 2014. 
  2. "The Swedish Acoustical Society Award for best Master's Thesis 2013". Chalmers Bygg- och miljöteknik Nyhetsbrev V.16, 2014. 2014. 
  3. "Ranjbari from Chalmers University of Technology receives 2015 Newman Medal.". 2015. http://acousticalsociety.org. 
  4. "Newman Medals, 2015; Behzad Ranjbari". Robert Bradford Newman Annual Newsletter. 2016. 
  5. Ranjbari, Behzad (June 2014). "Investigation of new metrics for the characterization of musicians' room acoustical conditions in concert halls". POMA (Proceedings of Meetings on Acoustics) issued by Acoustical Society of America (ASA) 15. http://asa.scitation.org/doi/abs/10.1121/1.4886819. 
  6. Ranjbari, Behzad (Spring 2014). "A Few Words About My Newly Proposed Metrics". The Acoustical Society of Sweden’s quarterly: ‘Svenska Ljudbladet’ 2014(1): 28–33. 
  7. Maroofi, Mousa (1995). The Radif of Persian Classical Music - Including an Introduction by Dr. Mehdi Barkeshli. Tehran, Iran: Iran Music Association. ISBN 979-0-802604-24-7. 
  8. 8.0 8.1 Ranjbari, Behzad (2005). "‘Investigation of electroacoustic methods applied to study of Persian musical scales’". ART Specialized Informative & Critical Monthly Review; Special issue: the Asian congress on music on the occasion of 775th Anniversary of Safi-e-din Ormavi’s Birth 83/77-78. 
  9. Ranjbari, Behzad (Mar 2006). "Classroom Acoustics: Acoustical Design in Educational Spaces; with Review of the Iranian National Building Regulations". Professional monthly of Iran State Organization of Building Engineering No. 11-03-07-84. 
  10. Ranjbari, Behzad (Oct 2005). "Acoustical Design in Speech Rooms". Me'mar; The Professional Bimonthly on Architecture and Urban Design 84-33. 
  11. "Acoustical Society of America Student Design Competitions (ASASDC)". http://asa.aip.org/baltimore/information.html. 
  12. Ranjbari, Behzad (2013). New Metrics for the Characterisation of Stage Acoustics in Concert Halls — for Symphony Orchestras. Gothenburg, Sweden: Chalmers University of Technology. "CPL ID: 187734" 
  13. 13.0 13.1 13.2 ISO 3382-1. 2006. ISO 3382-1 Acoustics-Measurement of Room Acoustic Parameters- Part1: Performance Rooms, Draft International Standard ISO/DIS 3382-1, International Organization for Standardization.
  14. "The BRL for Acoustics | Competences". http://www.brlacoustics.se/The%20BRL%20for%20Acoustics%20_%20Competences.html. 
  15. "Improved Metrics for the Characterization of Musicians’ Room Acoustical Conditions in Concert Halls". The Journal of the Acoustical Society of America 131, Issue4. 2012. http://asa.scitation.org/doi/abs/10.1121/1.4708595. 
  16. New Metrics for the Characterisation of Stage Acoustics in Concert Halls — for Symphony Orchestras. Gothenburg, Sweden: Chalmers University of Technology. 2013. pp. XV. "CPL ID: 187734" 
  17. "Behzad spelar klassisk persisk santoor för oss på Nordstan nu. Magiskt!". 2014. http://planeta.se.