60+ Years Experience
Our team has combined experience of over 60 years in the hearing conservation.
Revolutionary Innovations
One of Mark’s innovations is the revolutionary iPad-based air conduction hearing test licensed exclusively to Specsavers and used in 900+ of their stores.
Mark Ashmore
RHAD, MIOA
Mark has worked in the hearing health arena for the past 30 years. He qualified as a Registered Hearing Aid Dispenser in 1994, subsequently working for a major hearing aid retailer followed by a leading manufacturer, before setting up his own independent private practice.
Gill Cussons
Gill has worked in noise assessment & hearing conservation for over 20 years. She began her acoustics career as the UK Sales Manager for a prominent UK noise measurement equipment manufacturer, then served as a Director for a noise consultancy. Driven by her passion for protecting workers’ hearing, Gill established her own company to provide noise assessments, implement noise management controls, and offer training on all aspects of noise at work.
Recognising a persistent challenge – employees not fitting hearing protection correctly and companies struggling to access hearing tests – she co-founded H4TLT to bridge this gap. Through her ongoing work, Gill remains committed to raising awareness, promoting best practices, and safeguarding the hearing health of employees across various industries