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Modular Hearing Aid daslp svdu.pptx
- 1. Modular Hearing Aid Presenting:- Indrajeet Mishra B.ASLP III sem Submitted to:- Vikash Sir
- 2. Introduction  Modular hearing is a type of hearing aid that could fitted as hearing assessment has been carried out.  Modular hearing aids are also called as ready to wear hearing aid.  It is a part of custom made hearing aid ( CIC, ITC, ITE )  It is totally standardized shape and size and its referred to as a modular hearing aid  It consist of module that includes the circuit which is built to fit into a custom hearing aid shell.
- 3. let’s learn more about it  Modular ITE/ITC/CIC hearing aids are those in which the hearing aid components are manufactured as a standard package. ITC hearing aids, in particular, have been made in a variety of cases having standard shapes. These can be thought of as ready-to-wear hearing aids, and physically fitting these aids to the ear merely comprises selecting the case with the shape that best matches the person’s ear canal and concha  Some modular hearing aids have a foam sleeve around the canal section of the aid, which reduces the problem of a loose fit and feedback oscillation. The disadvantage is that the foam material deteriorates and regularly has to be replaced
- 4.  Another type of modular hearing aid that appeared during the early part of this century was the disposable ITC hearing aid.  These hearing aids contain an embedded cell (i.e. battery), and the complete hearing aid must be replaced when the cell fully discharges.  These devices have an extremely low cost (per device, but not per year) combined with good quality electronics and transducers, and the ITC version was available in a range of gain-frequency response shapes.  Their frequency response, internal noise, and distortion compared favorably with much more expensive hearing aids.
- 5. Cont…  These performance characteristics make it clear that the high cost of hearing aids is more related to the high development costs, low manufacturing volumes, and high marketing, distribution, fitting and support costs, than to the cost of device production. Like other modular hearing aids, comfort and retention for the disposable ITC version were not as good, on average, as for custom hearing aid  BTE and body-level hearing aids could also be called modular hearing aids, as the electrical and mechanical components have a fixed size and shape, which are then connected to either an individual earmold or a standard (i.e. pre-manufactured) dome located in the ear canal.  When used with a standard dome, either as a tube fitting or with a receiver in the ear canal (RITE), BTEs are completely modular and can therefore be fit to the client on the same day as the client’s hearing is assessed. BTEs are not, however, usually referred to as modular aids, because no one has yet invented any way to make a custom BTE aid (apart from the custom earmold)
- 6. Advantages & Disadvantages Modular hearing aids have several advantages and disadvantages Advantages  The module can be manufactured and tested in a more automated manner, which lowers cost and increases reliability  It can be attractive for the client and the clinician to be able to fit a hearing aid as soon as a hearing assessment has been carried out.  No need to take ear impressions and complete the fitting at a later appointment. Disadvantages  The disadvantages can be severe. For many ears, there may be no standard case that fits in a cosmetically or functionally acceptable manner.  The aid may fall out too easily, or there may be so much leakage around the case that the hearing aid whistles at gain settings lower than those needed by the aid wearer for adequate audibility
- 7. Reference ï‚š Hearing aids, Harvey Dillon, second Edition
- 8. Any query?
- 10. Thank you