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HIS 240

Terms in this set (86)

Capacity of button cell batteries are rated by their:
milliamps
In ANSI test box analysis, the standard input decibel level to determine the hearing instrument gain is:
Sixty decibels.
High frequency average gain is a reference used to determine:
The hearing instrument frequency response
Which component is not found in a hearing instrument amplifier?
transducer
The carbon phase of hearing instrument development allowed the hearing instrument to be worn at ear level on the head.
False
Microphones which have the greatest frequency response are:
Electret
A 2cc coupler is always used for ANSI measurement purposes:
True
Which phase would not allow the hearing instrument to be worn on the head?
The carbon microphone phase
Only one transistor may be used in a hearing instrument amplifier.
False
An output transducer also known as a:
reciever
Gain is the electroacoustic function of a hearing instrument which is necessary to know when attempting to provide:
Audibility for the patient/client.
What was the first phase of the five phases of hearing instrument development?
The acoustic resonator phase
The integrated chip phase was used exclusively in which style of hearing instrument?
In-the-ear
American National Standards Institute creates measurement criteria to:
Standardize consistent measurement of hearing instrument performance.
A class A receiver has a higher peak frequency response than a Class D.
False
Electronically, a user operated tone control for a hearing instrument circuit is termed a:
Switched capacitor
Which one of the following is not a transducer?
a volumn control
In ANSI test box analysis, the standard input decibel level to determine the hearing instrument output is:
Ninety decibels.
_______ is always used for the large hearing instrument button cell battery.
blue tape
Equivalent input noise measurements require a stimulus signal.
False
Input compression is most often used with mild to moderate hearing loss; and severe to profound hearing loss most often has output compression applied.
True
An almost flat line to the right of the kneepoint on an input/output graph would indicate:
increased compression
Adjustable compression ratios and kneepoint can provide the opportunity to restore _________ to each patient/client.
normal loudness
Equivalent input noise is a measurement commonly performed using a:
Test/analizer box
It is common practice to perform Hearing Instrument testing on your instruments when you receive them from the manufacturer. You can get valid results on analog and /or programmable digital hearing instruments using the same procedure.
True, because ANSI standard applies to all hearing instruments.
Your patient/client complains that their hearing instruments are not as clear as they used to be, and they continuously "whistle". What action would you take FIRST?
perform otoscopic inspection
Short attack and release times with high compression ratios will produce the greatest opportunity for distortion of the compession output.
True
There are basically two characteristics of compression. They are static and ________ .
Dynamic
The MOST important reason to wash your hands before and after each service is:
It helps prevent the spread of infectious disease.
Modifying a compression strategy spectrally would directly involve the input frequencies to the hearing instrument.
True
Cerumen would MOST LIKELY affect which of the following digital hearing instrument components?
Receiver
Two basic subsets for wide dynamic range compression (WDRC) hearing instruments is TILL and ______ .
BILL
Average detection compression for high frequency channels and __________ compression for low frequency channels are often used when creating digital algorithms.
Syllabic
Today's digital hearing instruments can generate their own pure tone sounds. This ability is often used in their phase cancellation algorithms and their _____________.
In-situ audiometry algorithm
Which electro-acoustically adjustable parameter of a hearing instrument would be used to achieve audibility of sound for the patient/client?
the gain
The "size of the shoe" for your patient/client is determined by the ________ of the prescribed hearing instrument(s):
output
The type of compression which does most of its work above the kneepoint is:
Output compression
According to ANSI standards, which electro-acoustic parameter is the most important when selecting amplification for a patient/client with a mild-moderate, sensorineural hearing loss, with MCL of 60 dB and LDL of 95dB?
output sound pressure level
There are no ANSI standards for the measurement of directional microphones in hearing instruments.
True
More dots of the Articulation Index are located in the ____________.
high frequencies
Wide dynamic range compression (WDRC) is always associated with:
input compression
Each dot of the Articulation Index represents the opportunity for a ______ ability for speech intelligibility.
one percent
There are two basic types of compression. They are input compression and ____________.
output compression
The most common user complaint/reason for hearing instrument returns to the manufacturer are:
sounds are too loud
Fast attack times are considered to be 10msec or less.
True
The compression ratio to the left of the kneepoint on an input/outpt graph is:
1:1
Today, most digital hearing instruments process loud inputs with input compression and soft inputs with output compression.
false
TILL processing is characterized by having low kneepoints for high frequency inputs.
True
A compression ratio of a linear amplifier would be:
1:1
A high compression kneepoint is often located above:
sixty decibles
How many gain levels (which are dependent upon various inputs) are affected with the change of a compression kneepoint?
three
Which compression ratio has the most linear sound with little distortion?
1:1
The dynamic aspects of compression are known as the
Kneepoint
DSP instruments contain both channels and bands which:
DSP instruments contain both channels and bands which:
All of the above
A patient/client who works in a noisy environment reports keeping the hearing instrument turned off most of the work day because loud sounds are uncomfortable.
What is the cause of the patient's/client's discomfort?
the output is too high
The most important pure tone frequency to understand speech is:
2KHz
When an input compression circuit receives one hundred decibels of input and its compression produces fifty decibels of output. This would be considered a:
2:1 compression ratio
Compression ratios may best be applied based upon the patient/client's revealed:
Residual hearing ability
Static compression characteristics involve:
Residual hearing ability
Only one type of compression strategy may be used within digital hearing instrument algorithms.
False
The input where the compression begins.
kneepoint
A patient/client is wearing new CIC hearing instruments and reports that sounds are often metallic or tinny. The hearing healthcare professional reduces the high frequency gain, but the problem persists. How should the hearing healthcare professional proceed?
Lower crossover
The patient/client, a 52-year-old computer executive comes in with a newspaper advertisement promising a hearing instrument that will let him hear perfectly, understand the small voice of his grandchild in noise, and handle the background noise at meetings. These claims:
are unreasonable expectations.
The fitting process is a step that needs to be repeatedly revisited over time. It allows the professional to:
All of the above
A patient/client with word recognition scores of 20% binaurally is being fitted with new hearing instruments. The patient/client requests help with understanding during meetings and face-to-face conversations. To which professional should the hearing healthcare professional refer the patient/client?
speech-language pathologist
A patient's records:
are confidential and require a written release from patient/client.
Of all the parts of the protocol, perhaps the more important are a discussion of the:
all the above
There are several pieces of information that must be discussed with the patient/client when recommending amplification. These include:
1. The limits of the hearing instrument.
2. The making of the hearing instrument.
3. Reasonable expectations for the hearing instrument.
4. The shape of the hearing instrument.
1 and 3 are correct
Selective amplification procedures assume that differences:
1. in hearing aids exist.
2. in amplification for patients exist.
3. can be measured.
4. are often negligible.
1, 2, and 3 are correct
Educating the patient entails more than fitting the device on the patient. It means teaching the patient how to:
All of the above
Your client, a 40-year old professional who is very sensitive about wearing hearing instruments, wants the smallest instruments possible. Your BEST option should be to:
demonstrate battery insertion
A hearing healthcare professional completes a patient's/client's CIC fitting and is counseling the patient/client and family members regarding additional listening strategies.
What should the hearing healthcare professional explain about ALDs?
ALDs should be used with hearing instruments as part of a total solution.
A patient/client should be able to understand speech most clearly in which environment?
a carpeted room with drapes and upholstered furniture
When counseling a patient/client, you SHOULD:
1. schedule follow-up appointments.
2. exclude her family.
3. discuss reasonable expectations.
4. counsel patient/client about mastectomy.
1 and 3 are correct
Which two tools should be used by hearing instrument users to facilitate feedback-free telephone conversations?
telecoil
The patient/client is a 34-year old male who presents at the clinic with "serious hearing loss". He states that he is HIV positive and is being treated with the "cocktail". It has caused severe hearing loss, bilaterally. Audiometric data indicate a severe-to-profound mid-to-high frequency sensorineural loss. His binaural word discrimination scores are worse than his best monaural score. In addition, his SRT is poorer than his speech frequency averages by about 10 dB. The hearing instrument specialist should:
1. Wash the hands before and after working with the patient's ears.
2. Wear latex gloves for the protection of the patient/client and others.
3. Clean headphone cushions, immittance probe tips, specula and earlight tips with viricide after use.
4. Inform the factory (at the time of order) to use Infection Control Procedures when working with the impression.
1, 2, 3, and 4 are all correct.
When counseling patients and their significant others concerning realistic expectations about hearing instruments, which of the following is NOT correct?
The hearing instrument will permit them to hear normally.
Your patient/client has Alzheimer's disease. During the delivery of a new hearing instrument, you SHOULD:
1. repeat everything to her.
2. have the care-giver present.
3. have her repeat and write your instructions.
4. teach family members about hearing instrument use and care.
2 and 4 are correct
A 62-year old male musician with a bilateral symmetrical flat loss, which appears sensorineural in nature, is currently wearing a single channel programmable ITE instrument on his left ear. He wants to upgrade but is highly critical of all hearing instruments due to his dissatisfaction with his current one. In counseling with the patient/client you will likely discover that:
1. he has trouble understanding in noise.
2. he has good directional ability with current fitting.
3. music sounds dull to him.
4. re-programming his current instrument will probably lead to satisfaction.
1 and 3 are correct
Upon entering your office, the patient/client makes hand gestures at you when you start asking for medical history. The hand waving might mean that the person ______:
is trying to communicate using manual signals.
When a patient/client is referred to you for evaluation by another professional, the appropriate response from you includes:
1. Write a referral consultation letter.
2. Send a copy of the test results obtained by you.
3. Send a recommendation for follow-up.
4. Send a copy of the patient's bill for information.
1, 2, and 3 are correct
During a one-week follow-up, a patient/client complains of difficulty hearing speech in background noise.
Which adjustments should the hearing healthcare professional make to the kneepoints of the hearing instruments?
55dB for low frequency and 70dB for high frequency
A patient/client is having trouble hearing when using a work telephone. What should a hearing healthcare professional recommend to this patient/client?
an in-line amplifier for the telephone
How do you hear the alarm when the hearing aid is removed?
all the above
The nursing home director gradually lost hearing over a number of years and decided it was time to get hearing instruments. She had observed many of the nursing home residents having difficulties with their hearing instruments "whistling". She knew that was due to poor fitting instruments because she had been told by someone that "hearing instruments "whistle" if they don't fit correctly". She told her dispenser that if her hearing aids "whistled" she wouldn't use them (see audiogram 1510). The dispenser should NEXT:
explain the potential for feedback with different types of fittings.
Patient records are:
confidential and subject to FDA inspections.
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