This page deals with the Inductive Loop - it's technology and where it can be of help:
The Inductive Loop converts an audio signal into an electrical current that flows through a looped wire from the output port back to the input port of the loop amplifier. The current passing through this wire produces a magnetic field which is picked up by the loop aerial of the hearing aid. Most hearing aids have a program which picks up only the magnetic signal and in these aids a clear non-corrupted signal is heard by the hearing aid wearer, however, other sounds around the wearer are unheard. Hearing aid manufacturers have developed programs where a mixture of pure loop signal and sound from the hearing aid's microphones is blended; so as to give the hearing aid wearer the sounds of their environment alongside the speech transmitted via the inductive loop.
How a loop systems improves ones ability to communicate:
Are you, like 1000's of hard of hearing suffers, fed up with
others overhearing the person who's speaking to you on your land line telephone when the volume is boosted enough for
you to understand them? There is a solution that won’t cost the earth, it's
easy to install, has priority over the TV or audio signal and allows you perfect
hearing of the caller's voice through the "T" loop setting on your hearing aid.
How the loop works - It is well known principle that when an alternating current is passed through a wire, a magnetic field is generated around the wire. If a second wire is brought within this magnetic field, a corresponding alternating current is created within the second wire. In technical language, it is said that a current is "induced" in the second wire. Hence the term "induction."
In the most basic form, an audio induction loop system consists of a loop of wire around the perimeter of an area that is connected to an induction loop amplifier. An input signal is provided to the induction loop amplifier, and the induction loop amplifier drives an audio current (note current not voltage) through the loop in the form of a strong alternating current.
The loop itself consists of a single core insulated wire, one turn of which is placed around the perimeter of the room. As the alternating current from the amplifier flows through the loop, it creates a magnetic field within the looped area and "induces" the telecoil in a hearing aid or in a specifically design induction loop receiver within the looped area.When a hearing aid user switches their hearing aid to the "T" position on the hearing aid, the telecoil in the hearing aid picks up the fluctuations in the magnetic field and converts them back into alternating currents. The alternating currents are amplified and converted by the hearing aid into sound.
The magnetic field within the looped area is strong enough to allow freedom of movement within the looped area and still receive the sound at a comfortable listening level. The performance of induction loop systems is specified by the IEC118-4 international standards.
The input to the induction loop amplifier can be a sound source such as a television or stereo, a public address or sound reinforcement system, a dedicated microphone, or any sound source that users inside the looped area wish to hear more clearly.
Not all loop layouts are a simple single wire surrounding a room, but this explanation illustrates the basic principles.
The main components of a home loop are:
A domestic loop amplifier
A power source for the amplifier normally 12 volts DC
Enough wire to be placed around the area to be covered
Clips to hold the loop wire in place
other items which can be added as extras include:
A chair pad loop aerial
Land line telephone connector
Door bell ringer
Fire alarm sounder and flasher
Intruder alarm
Microphone
This diagram illustrates a normal domestic installation:
The amplifier supplied by RITA'S EARS can accept up to 4 different audio inputs simultaneously.
The amplifier:
the connections view:
rather than place a wire all around a room we provide a local aerial in the form of a chair pad aerial.
How the loop works - It is well known principle that when an alternating current is passed through a wire, a magnetic field is generated around the wire. If a second wire is brought within this magnetic field, a corresponding alternating current is created within the second wire. In technical language, it is said that a current is "induced" in the second wire. Hence the term "induction."
In the most basic form, an audio induction loop system consists of a loop of wire around the perimeter of an area that is connected to an induction loop amplifier. An input signal is provided to the induction loop amplifier, and the induction loop amplifier drives an audio current (note current not voltage) through the loop in the form of a strong alternating current.
The loop itself consists of a single core insulated wire, one turn of which is placed around the perimeter of the room. As the alternating current from the amplifier flows through the loop, it creates a magnetic field within the looped area and "induces" the telecoil in a hearing aid or in a specifically design induction loop receiver within the looped area.When a hearing aid user switches their hearing aid to the "T" position on the hearing aid, the telecoil in the hearing aid picks up the fluctuations in the magnetic field and converts them back into alternating currents. The alternating currents are amplified and converted by the hearing aid into sound.
The magnetic field within the looped area is strong enough to allow freedom of movement within the looped area and still receive the sound at a comfortable listening level. The performance of induction loop systems is specified by the IEC118-4 international standards.
The input to the induction loop amplifier can be a sound source such as a television or stereo, a public address or sound reinforcement system, a dedicated microphone, or any sound source that users inside the looped area wish to hear more clearly.
Not all loop layouts are a simple single wire surrounding a room, but this explanation illustrates the basic principles.
The main components of a home loop are:
A domestic loop amplifier
A power source for the amplifier normally 12 volts DC
Enough wire to be placed around the area to be covered
Clips to hold the loop wire in place
other items which can be added as extras include:
A chair pad loop aerial
Land line telephone connector
Door bell ringer
Fire alarm sounder and flasher
Intruder alarm
Microphone
This diagram illustrates a normal domestic installation:
The amplifier supplied by RITA'S EARS can accept up to 4 different audio inputs simultaneously.
The amplifier:
rita's ears supplies hearing instruments and accessories from the major European, North American and Far Eastern manufacturers as shown below:
There are basically four categories of technology. The average selling price of instruments relates directly to the technology band associated with that product. Below is a list of product categories by technology. Individual product category prices vary between each individual manufacturer and can be advised as and when requested.
The four technology categories are:
- Premium - contains multiple programs, wireless technology, ear to ear connectivity, more than 12 channels, superior noise management, high fidelity sound, bluetooth.
- Advanced - contains multiple programs, may have wireless technology, has between 8 and 12 channels, noise management, remote control, wind management.
- Essential - multiple programs, basic program selection has less than 8 channels, auto phone, whistle free, auto-program feature.
- Basic - 3 - 6 channels, 2 or 3 programs including "T" loop, basic program selection, could have twin microphones.
TERMS, CONDITIONS and AFTERCARE for Non Care Plan Products sold by Robert I Trethewey Retired Audiologist
"rita's ears" is a trading name of Robert I Trethewey Retired Audiologist.
Robert I Trethewey Retired Audiologist hereafter known as the “Company” extends the highest level of professional qualified hearing aid dispensing to you the undersigned client, using the latest audiological hearing aid technology with the intention of improving your hearing and subsequently your quality of life.
The quoted hearing aid(s) price includes the selected manufacturer's comprehensive repair warranty and our one-year aftercare program as standard. Please note: Any replacement hearing aid or accessory issued during the term of the original instruments warranty will only have the remainder of that original warranty remaining. Extra years of manufacturer's warranty may be purchased within 90 days of the original purchase date.
Damage due to: misuse, accident, negligence, attempted repairs and /or excessive failure due to the ingress of wax will not be covered under the warranty. Interference with the instrument or replacement of parts other than by the manufacturer, or the manufacturer's authorised agent render the warranty invalid.
After the purchase of hearing aid(s) all appointments within the first 12 months thereafter are free. If BTE hearing aid(s) are supplied mould(s) will be supplied with the order, if that order is subsequently cancelled the price of the supplied mould(s) will be deducted from any moneys paid. Should the client be unable to be seen by us (during the normal working week (Monday through Friday), with the exception of Bank Holidays) and the hearing aid fails to function, an addressed box can be provided to speed up the repair and/or its servicing.
In the first thirty days of the order being placed, the client may upgrade or downgrade the aid at the dispenser's discretion, paying the difference or receiving a refund as appropriate, please remember that the original packaging must not be damaged.
Refunds cannot be initiated by new technologies becoming available, the client obtaining a lower price from a competitor, or death. Trustees of the client's estate may not claim a refund on the client's behalf. The Company cannot be held responsible for client's deterioration of hearing loss, ageing or illness.
All Hearing Aid Dispensers working in the UK are required to be registered with the: Health & Care Professions Council. Standards of conduct, performance and ethics can be obtainable from:
Health & Care Professions Council, Park House, 184-186 Kennington Park Road, London SE11 4BU LL:+44(0)300 5006184
This Contract does not affect your statutory rights. Continued Terms, Conditions and Aftercare.
1. Batteries are provided within the first 12 months as per contract. Usage is based on the Company's average client experience. With so many hearing aids it is difficult to calculate exact battery life for each client's aid. Consequently, after your allocation, the client will be entitled to discounted batteries within the terms of their aftercare contract.
2. All appointments within the first 12 months after a hearing aid or aids has been fitted are free. Home visits within the first three months of fitting are free of charge with further visits within the contract at the Company's discretion a charge may be included to cover for travelling costs. After this period the Company has the right to charge for a home visit at £50 per visit within a 10-mile radius of Shillingstone Dorset. Visits further than 10 miles may also incur an additional charge of 50p per mile per single journey.
3. Hearing aid fitting is a very personal process. No two clients are the same. The Company will endeavour to have the client fitted and rehabilitated within ninety days. The client may return the Hearing Aids and or accessories within 30 days from the fitting date to receive a full refund. After this and up to a maximum of 90 days from the original date of supply there may be a charge imposed. All returned items must be in their original unspoiled packaging as supplied. Failure to do so may result in a reduced refund or in some cases no refund being available. Where bespoke moulds are included a charge of £24 (single) and £45 (pair), £55 (per Slim tip, Micro mould or Custom Mould) may be incurred. Prices may vary according to type. A set of moulds, and the re-tubing of these moulds, is provided free for all new BTE hearing aids within the first 12 months of the contract. After 12 months has elapsed the list price will be charged as per the aftercare contract.
4.The listed hearing aid prices of the Company are the best available to our knowledge at the time of signing this contract calculated on our costs, overheads and level of service. We cannot be held responsible for price reductions from the manufacturer that will alter our pricing structure and our marketing strategy. The client is not entitled to any form of refund if such aforementioned situation arises.
5. All contract terms and conditions are based on the commencement of the initial fitted product, regardless of whether the hearing aid has been re-made or modified. Should the hearing aid have been changed for a new and or different make or model for whatever reason, the manufacturer's warranty will commence from the original fitting date. It is understood that aftercare begins with effect from the fitting date of the original Hearing aid.
A large print version of The Company's Terms and Conditions is available if requested.
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