Widex PureSound™ Offers a More Natural Sound while Preserving Speech-in-Noise Performance
Widex MOMENT™ defies tradition by providing patients with mild-to-moderate hearing loss a new dedicated design for their specific needs — resulting in more natural hearing without compromise.
Why does processing delay matter?
The time it takes for a digital hearing aid to process sound—typically around four to eight milliseconds— creates a distortion known as the comb-filter effect when processed sound mixes with unprocessed sound in the ear canal. This distortion is responsible for the artificial “hearing aid sound” that can reduce wearer adoption and satisfaction. WIDEX MOMENT™ has eradicated this distortion with the development of Widex PureSound™, an accelerated processing pathway powered by ZeroDelay™ technology, resulting in a 0.5 millisecond delay.**
How is Widex PureSound™ Possible?
In most digital hearing aids, the input signal goes through a filter bank, which splits the input into different channels for subsequent processing. This processing takes time, which delays the hearing aid sound arriving in the ear canal. Achieving a shorter delay requires a completely new signal processing paradigm. Built on a heritage of sound excellence, Widex is the only manufacturer that bases our signal processing exclusively on a time-domain filter bank, allowing for low delay and signal processing efficiency from the outset. PureSound™ takes low delay to a new level by working in parallel to the classic filter bank path (known as the Universal or master program) so that wearers can benefit from PureSound™ or Universal, without compromise.
Who benefits from Widex PureSound™?
Ultrafast signal processing most benefits hearing aid wearers with open and vented fittings, which allow more natural sound into the ear canal, resulting in larger combfilter effects and the artificial sound quality that PureSound™ eliminates.
WIDEX MOMENT™ EVIDENCE: Widex PureSound™ Offers a More Natural Sound while Preserving Speech-in-Noise Performance
Does PureSound™ sacrifice speech-in-noise performance for natural sound? 
21 hearing-impaired listeners participated in a study to compare the performance of Widex PureSound™, which uses an omni-directional microphone, against two other manufacturers’ premium hearing aids, which use directional microphones. The study used the Quick Repeat-Recall Test to assess the subjects’ speech understanding in noise under realistic SNRs (Kuk et al 2020) using low-context sentences at SNRs of 5, 10, and 15 dB. With average accuracy increasing from 60% at 5 dB SNR to 80% at 10 dB SNR and 85% at 15 dB SNR, all hearing aids provided a similar (within 5%) speech-innoise performance. More importantly, the performance of subjects with hearing loss was within the average range of listeners with normal hearing.
What does this mean for Hearing Healthcare Professionals?
  • The 85% of hearing-impaired listeners and 100% of normal-hearing listeners who prefer PureSound™ do not sacrifice real-life speech understanding to enjoy the pure, natural sound available with WIDEX MOMENT™.*
  • Widex PureSound™ delivers excellent speech-in-noise understanding using omnidirectional microphone technology, comparable to other premium hearing aids using directional microphones.***
  • WIDEX MOMENT™ wearers can enjoy the benefit of directional microphones in more challenging SNR environments using the Widex Universal Pathway.***
  • WIDEX MOMENT™ wearers have full control of the features that help them hear their best in a variety of real-life listening environments.

WIDEX MOMENT™: Backed by Science. Proven in Tests. Preferred in Real Life.

*Balling, Laura W., PhD; Townend, Oliver; Steifenhofer, Georg, MSc; Switalksi,Wendy, AuD, MBA. (April 2020) Reducing Hearing Aid Delay for Optimal Sound Quality: A New Paradigm in Processing. Hearing Review, Vol. 27, No. 4: 20-26. **Data on file. ***Francis Kuk, Neal Ruperto, Christopher Slugocki, Petri Korhonen (2020). A MOMENT of truth: Efficacy of directional microphones in open fitting under realistic signal-to-noise ratios. Hearing Review 27(6).