Rigorous peer-reviews are the basis of high-quality academic publishing. Thanks to the great efforts of our reviewers, Vibration was able to maintain its standards for the high quality of its published papers. Thanks to the contribution of our reviewers, in 2021, the median time to first decision was 17.5 days and the median time to publication was 50.5 days. The editors would like to extend their gratitude and recognition to the following reviewers for their precious time and dedication, regardless of whether the papers they reviewed were finally published:
| Alfredo Güemes | Jung Woo Sohn |
| Ana Paula Betencourt Martins Amaro | Konstantinos Kapasakalis |
| Andrea Zanoni | Konstantinos Morfidis |
| Andrzej Katunin | Larisa Dunai |
| Andrzej Kubik | Livija Cveticanin |
| Angel Perez-Cruz | Mahmood Shafiee |
| Antonietta Lo Conte | Marcin Kluczyk |
| Antonino Morassi | Marco Furinghetti |
| Armin Mehrabi | Marco Tarabini |
| Aryan Rezaei Rad | Marta Berardengo |
| Aykut Tamer | Merten Stender |
| Bartłomiej Będkowski | Michalis Hadjioannou |
| Behrokh Abbasnejad | Miguel Angel Olivares-Robles |
| Béla Takarics | Mirko Karakašić |
| Bilal Asad | Mykola Sysyn |
| Carmelo Majorana | Najib Kacem |
| Carmen Debeleac | Nathan Patterson |
| Chan-Jung Kim | Nediljka Gaurina-Međimurec |
| Chao Fu | Nikolaos Nikitas |
| Chengqing Liu | Nobuyuki Shibata |
| Chien-Chang Chen | Paweł Dunaj |
| Chuan-Zhi Dong | Pengfei Liu |
| Chul-Hee Lee | Pierre Margerit |
| Cong Qiu | Rafael Shehu |
| Daniil Yurchenko | Raimondas Jasevicius |
| Dmytro Chumachenko | Ralf Stetter |
| Do-Kwan Hong | Robert Panowicz |
| Dong Guan | Rossella Arrigo |
| Dong Ye | Ryszard Chmielewski |
| Elena Ferretti | Sandeep Sony |
| Elżbieta Pilecka | Sansit Patnaik |
| Enrique García-Macías | Sergio Ruggieri |
| Felix Weber | Setsuo Maeda |
| František Lopot | Shadi Alameddin |
| Frederico Afonso | Songtao Xue |
| Gareth Vio | Stan Marius |
| Giancarlo Ramaglia | Stefano Valvano |
| Goran Gazić | Syed A. Bukhari |
| Guandong Qiao | Timothy Waters |
| Hany Hassanin | Tomasz Figlus |
| Heinz Kleinöder | Tomasz Kałączyński |
| Hongsheng Li | Traian Mazilu |
| Huilong Ren | Vitor Carneiro |
| Iman Izadgoshasb | Wensheng Wang |
| Ioannis T. Georgiou | Wojciech Lisowski |
| Ivan Giorgio | Won-hee You |
| Jean-Mathieu Mencik | Xavier Chiementin |
| Jesus Manuel Fernandez Oro | Xiaomeng Wang |
| Jiaqi Xu | Xiao-Zhou Liu |
| Jiri Cecrdle | Ya Huang |
| João M. C. Estêvão | Yawen Wang |
| José A. Tenreiro Machado | Yilun Shang |
| Jose Ángel López Campos | Yu Zhang |
| Juan David Cano-Moreno | Yumeng Yao |
| Juan-José González De La Rosa | Yves Gourinat |
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