Mr Costello has given talks to many different groups on the anatomy and physiology of the voice, including the chorus of Glyndebourne Opera, the National Opera Studio, Cambridge and Oxford College choirs. He is happy to receive enquires about speaking engagements.
Forthcoming public workshops can be found at voiceworkshop.co.uk
Mr Costello's work has featured in the national press (Daily Mail, Daily Express). He has contributed features on vocal fold injections to BBC Radio 4's Inside Health and has also spoken on BBC television and radio discussing the countertenor voice (Imagine - Just one Falsetto, The Countertenor).
In January 2014, he appeared on Inside Health once more, discussing spasmodic dysphonia (laryngeal dystonia).
In a further interview on Inside Health, he spoke about vocal fold nodules in July 2014.
In June 2015, Mr Costello appeared on the Radio 3 programme “An Anatomy of Singing” [www.bbc.co.uk/programmes/b05zgh64], talking to Mary King about the complex anatomy that contributes to the singing voice.
In an interview about vocal health (“A Session with the Voice Doctor”), Mr Costello spoke to Sinifini Music in September 2015 [www.sinfinimusic.com/uk/features/other-features/a-session-with-the-voice-doctor-laryngologist-declan-costello-2015]
The Daily Mail reported his comments on vocal problems in teachers in August 2015 [www.dailymail.co.uk/health/article-3209416/How-baker-asthma-hairdressers-terrible-skin-job-making-ill.html]
Mr Costello runs regular workshops (in association with Merz) for ENT surgeons wishing to learn the technique of vocal cord medialisation injection in the clinic. Please email declan.costello@uhb.nhs.uk for more information.
In an article in January 2018 on vocal registers, Jennifer Johnston wrote a piece for The Guardian [www.theguardian.com/music/2018/mar/06/jennifer-johnston-comment-women-opera-tenor-voices] in which she responded to suggestions that women may be taking on tenor roles in opera in future. Mr Costello provided some quotations for the article.