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    patient s ear as the tone generator This gives precise fitting to the hearing loss characteristics These 1 3 octave bandwidth channels can have cutoff slopes as steep as 50 dB per octave in the speech region if the hearing loss and background noise require it and can adjust the bandpass slope depending on the need becoming much less steep in quiet situations Each of the channels has a compression threshold below 20 dB HL with an input compression range of over 70 dB Multi segmental compression has the goal to make soft sounds audible loud sounds comfortable and to enhance speech sounds Each channel includes a sound stabilizer and an anti smearing system to enhance soft sounds after loud inputs and to preserve speech contrasts Dual microphones Self calibrating dual microphones are used to provide a directional system that allows the Diva computer to locate and reduce disturbing noise The microphones continuously compare amplitude and phase with each other and adjust their outputs to compensate for changes even changes due to usage The microphone outputs are combined by the Diva computer to give an adaptive directional listening beam which is used to reduce unwanted background noise even noise that moves like a passing car or noise in a restaurant A noise classification system adjusts the response of the microphones to minimize noise even working to reduce wind noise by 25 to 30 dB 4 programs The Diva can be programmed to have up to 4 different listening programs Microphone MT Telecoil and Music in all models except the CIC case style A push button changes from one program to another Widex assumes that the M program will be used for nearly all situations with all functions performed automatically The alternate programs would be used to provide telephone coil capability

    Original URL path: http://www.hearingcenter.com/httpdocs/info_files/Widex_DIVA.html (2016-02-01)
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    Widex was one of the first companies to offer digital signal processing hearing aids Their circuits have proven to be very popular with our customers over the years even with the increased competition presently on the market some offices sell over 16 different brands and models of dsp hearing aids and the number keeps increasing Since Widex first introduced the Senso they have added models including ones with directional microphones telephone coils for non CIC models power circuits for severe hearing losses a non automatic model with a volume control P series and BTE models in colors beige brown gray red yellow blue green and black They also released the Senso Plus circuit The Senso Plus uses the same basic digital signal processing ideas but adds several new features To refresh your memory the basic Senso has three independent channels for sound processing uses time domain processing to disquingish speech from noise selectively reduces noise signals has automatic feedback control and is completely automatic in operation Sound Stabilizer The Sound Stabilizer brings the hearing aid gain back to normal more quickly after a long lasting burst of sound This means that dynamic changes in signals sound more normal to the user Speech Intensification System The Speech Intensification System listens for speech signals in the presence of noise and will automatically boost the amplification in the frequency most important for speech intelligibility while reducing the gain at the frequency containing the noise This system reduces the masking effects of noise on speech Widex found in laboratory tests that this resulted in a significant improvement in recognition of monosyllables as compared to Senso not Plus in both party and car noise situations Automatic Output Control This AOC circuit limits the output in high signal and high gain situations to avoid clipping This

    Original URL path: http://www.hearingcenter.com/httpdocs/info_files/Widex_Senso.html (2016-02-01)
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    designed to reduce steady state noises such as air conditioners cafeteria babble engines and road noises One user reported that the background noise of the airplane he was riding in almost completely disappeared which gave him quite a scare when the signal processor circuit turned on Oticon DigiFocus The DigiFocus aid is very similar to Oticon s MultiFocus hearing aid substituting digital signal processing for the analog circuits in their older aid Digitized input signals sampled at about 16 kHz are divided into seven frequency bands from 125 to 6000 Hz where circuits apply frequency shaping to match the users ears The signals are then sent to two digital signal processors one for high frequencies and the other for low frequencies This allows the hearing aid to apply different compression and amplification parameters to the signals using syllabic compression at the low frequencies and adaptive gain at the high frequencies The analog Oticon MultiFocus has been on the market for many years and has been shown in clinical studies using subjects with mild moderate and severe hearing losses to improve speech audibility in quiet conditions to cause less annoyance from unwanted environmental sounds like newspapers rustling to have less likelihood of acoustical feedback and to have higher overall user preference than the other analog hearing aids used in the studies Micro Tech Philips and Lori and Telex Micro Tech and Philips joined forces and developed new digital signal processing dsp hearing aids based on an Open Architecture dsp chip that allows each of them to use their own software in the processors They also jointly developed a remote control to use with their hearing aids These dsp hearing aids were available in three case styles BTE ITE and ITC These aids have the ability to have four different listening programs such as quiet crowd noise concert hall etc which can be changed from the remote control These brands of dsp hearing aids offer the possibility that the software could be upgraded as technology improves in the coming years This might be useful in repairing software errors and for adding different listening programs Lori and Telex went on to join the Micro Tech and Philips team to offer the Open Architecture dsp hearing aids as well Bernafon Bernafon has a dsp hearing aid that has two channels and a volume control The two channels allow the aid to process the high and low frequencies independently The volume control is a knob on the case that allows the user a 25dB range of control This volume control is not available on the CIC case style Siemens Prisma The Siemens Prisma dsp hearing aid is a four channel circuit that allows the audiologist a tremendous range in fitting control The overall circuit contains a preamplifier with high level compression followed by a 23 bit analog to digital converter that yields a 138dB dynamic range The digital signal processor chip operates at 150 million operations per second and is followed by an all digital

    Original URL path: http://www.hearingcenter.com/httpdocs/info_files/digitalha.html (2016-02-01)
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    Adapto Axent Claro Canta7 Digital 5000 Songbird Trano Widex DIVA Widex Senso ReSound Avance Hearing Enhancer DISCONTINUED by ReSound January 1 2003 Sorry The hearing industry has tried to ignore the sales of mail order hearing aids because the devices are sold with inflated claims and without medical or audiological supervision The government has been trying to close down the operations but they keep moving to different states and avoiding the law But the sales continue and so do the problems A recent issue of the Hearing Journal talks about some of the problems One patient discussed in the article had a sizing sleeve used to create the proper fit come off in her ear and had to have it surgically removed She also experienced a bloody discharge and a perforated tympanic membrane She was scheduled for more surgeries as the article was being written According to the article other brands solve the fit problem by having the customer take a cast of his own ears and send it back to the company I wonder what happens if the casting material gets stuck in there or some breaks off in the ear More surgeries Well ReSound Corporation noticed all of this and created a device designed to help the people who don t want a real hearing aid but do want some assistance It is for people with a mild high frequency hearing loss It uses a fairly sophisticated two channel circuit however it cannot be adjusted like real hearing aids ReSound bills it as being like reading glasses for the ears The ReSound Avance is a small gadget that fits behind the ear and sends the sound into the ear with a small tube It is nearly invisible and was sold only by audiologists The idea here is that

    Original URL path: http://www.hearingcenter.com/httpdocs/info_files/ReSoundAvance.html (2016-02-01)
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    Industry People Archives Hearing Aid Technology Digital HA History Older Hearing Aids Adapto Axent Claro Canta7 Digital 5000 Songbird Trano Widex DIVA Widex Senso Audiology Questions Questions about audiologists where to find them and about audiological topics What is an audiologist Free testing clinics Do it yourself hearing test Violently dizzy Where can I get CIC hearing aids and what do they cost Direction of sound Earmolds and other problems

    Original URL path: http://www.hearingcenter.com/httpdocs/Questions/QAud.html (2016-02-01)
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    appearance Widex Inteo BTE appearance ReSound AZURE Hearing Professionals Director s Corner Hearing Aid Repairs One Clinic s History Sudden Loss Article Travel Suggestions Miss America Spot TV News Outreach About this site Ask the Audiologist Industry News Hearing Groups AHAA AAA ASHA BHI SHHH Industry People Archives Hearing Aid Technology Digital HA History Older Hearing Aids Adapto Axent Claro Canta7 Digital 5000 Songbird Trano Widex DIVA Widex Senso Children

    Original URL path: http://www.hearingcenter.com/httpdocs/Questions/QChild.html (2016-02-01)
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    s History Sudden Loss Article Travel Suggestions Miss America Spot TV News Outreach About this site Ask the Audiologist Industry News Hearing Groups AHAA AAA ASHA BHI SHHH Industry People Archives Hearing Aid Technology Digital HA History Older Hearing Aids Adapto Axent Claro Canta7 Digital 5000 Songbird Trano Widex DIVA Widex Senso Speech Problems Questions Both children and adults have speech problems It is interesting that so many of these

    Original URL path: http://www.hearingcenter.com/httpdocs/Questions/QSpeech.html (2016-02-01)
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    AHAA AAA ASHA BHI SHHH Industry People Archives Hearing Aid Technology Digital HA History Older Hearing Aids Adapto Axent Claro Canta7 Digital 5000 Songbird Trano Widex DIVA Widex Senso Medical Questions Audiology and medicine are closely related Audiologists are asked many medical questions largely because they have the time to answer them When you have medical questions please check with your medical doctor We are happy to help translate what

    Original URL path: http://www.hearingcenter.com/httpdocs/Questions/QMedical.html (2016-02-01)
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