Download SENSO P38 SENSO

SENSO P38
SENSO P38
100% digital, High Power BTE
• Programmable (LP2 or COMPASS)
• 3 channel DSP
with VarioSlope™ filters
• Sound Stabilizer™
• Enhanced Dynamic Range
Compression
• Automatic Feedback Manager
• Optional Digital Comfort VC
Technical Data
OSPL90:
711
Ear simulator
2cc
Coupler
Peak
144 dB SPL
138 dB SPL
1000 Hz
143 dB SPL
138 dB SPL
HAIC
139 dB SPL
134 dB SPL
Battery Drain (st. by)
Battery Drain (typical)
The SENSO P38 features, together with the elegant design,
make it a natural extension of hearing rather than just an aid.
The SENSO Digital Signal Processor (DSP) works with 20-bit
representation of the signal and a sampling rate of 32 kHz.
SENSO P38 is a superbly engineered hearing aid in the renowned Widex tradition.
Battery Life (675ZA, 600 mAh)*
Relative Telecoil Sensitivity**
• 3 channel DSP with VarioSlope™ filters for accurate and
versatile fitting.
• Enhanced Dynamic Range Compression to maximize
speech intelligibility and listening comfort.
• Sound Stabilizer™ for fast adjustment to sudden
changes in the sound environment while maintaining
speech intelligibility and speech dynamic range.
Recommended for:
• Moderately severe to profound hearing
losses.
• All configurations of hearing loss including conductive, fluctuating, sloping, flat
and reverse slope losses.
• Persons wanting the digital solution to
their hearing loss.
Suggested Fitting Range
• Automatic Feedback Manager (patent pending) for
reduction of acoustic feedback.
• Optional Digital Comfort Volume Control (± 6 dB range)
with beep-tone adjustment indicator.
140
130
120
1.2 mA
110
500 hours
+ 3 dB
1%
IRIL (900/1800 MHz)
0/15 dB SPL
Typical data that mimic Ref. Test Gain conditions (HTL values of 85, 100
and 100 with an input of 65 dB SPL).
Under more severe conditions (HTL values of 115, 120 and 120, and an
input of 80 dB SPL) where High Power batteries are necessary, battery
life can drop to 100 hours.
** A telecoil input of 100 mA/m will equal a microphone input of 70 dB SPL.
SENSO P38 offers you:
Output dB SPL
1.0 mA
Harmonic Distortion
*
Maximum Output (ear simulator - IEC711)
A
B
100
90
100
200
500 1000
Frequency
A : AOC disabled
2000
5000
Hz
B : AOC enabled
Maximum Output (2cc coupler - IEC126)
Output dB SPL
140
130
A
B
120
110
100
90
100
200
500 1000
Frequency
A : AOC disabled
2000
5000
Hz
B : AOC enabled
AOC (Automatic Output Control) is an output limiting compression
circuit that eliminates distortion from saturation. It can be turned on
(=factory setting) and off from the programming devices.
• M, MT, and T settings available. The “T” and “MT” responses are compensated to preserve the frequency
and output level of the acoustic signal.
• The microphone and telecoil inputs each have their own
Sigma-Delta converter allowing a telecoil with a digital
anti-hum filter to reduce interference from the mains.
• Long battery life of approximately 500 hours.
• Low battery beep-tone indicator.
• Minimal audible internal noise due to special processing.
• Digital Power Drive™ (DPD). SENSO’s Direct Digital
Drive (patent pending) developed for high power instruments.
• Direct audio input.
(P!P38!3101!10154)
Printed by Widex / 7-98
P P38 3101 101
SENSO P38
Sound Stabilizer™
In automatic hearing aids, the gain adjustment has
to work fast in order to adapt quickly to changes in
the environment. The fast gain adjustment of such
systems will often cause “pumping” effects which
can be very annoying for the user, especially in
noisy surroundings, and may result in reduced
speech comprehension.
Automatic Feedback Manager
VarioSlope™ filters
Traditional filters
VarioSlope™ filters
Amplified Speech
Enhanced Dynamic Range
Compression
Output dB HL
100
Enhanced Dynamic Range Compression works to
present all signals to the SENSO P38 user at a natural sensation level.
HTL
80
60
40
In these two audiograms, HTLs and UCLs of a profound hearing loss are shown. For each of three different speech signals, both unamplified and amplified speech spectra are shown.
20
20
The Sound Stabilizer™ applies different regulation
speeds to different signals. This forces the SENSO
P38 to keep a steady gain in stable sound environments, optimizing speech intelligibility, but ensuring
the needed fast adaptation to changes in the acoustic environment. After shouting or other loud sounds,
P38 will quickly turn up amplification to allow listening to normal speech.
Unamplified Speech
40
60
80
100 Input dB HL
SENSO P38 has a built-in Automatic Feedback
Manager which minimizes feedback.
Soft Speech (53 dB SPL)
It is worth noting that:
Normal Speech (62 dB SPL)
The Enhanced Dynamic Range Compression system requires high gain for low level inputs. Depending on the earmould quality, the high gain will
increase the risk of feedback in quiet surroundings.
1.Amplified speech is made audible in all cases, as it is
reproduced between the users’ HTL and UCL.
Loud Speech (75 dB SPL)
2. Amplification is different for different levels of
speech. Comparison of amplified and unamplified speech reveals 55 dB amplification in the low
frequencies for soft speech and 40 dB for loud
speech.
In each of the three channels, the Automatic Feedback Manager verifies if the high gain is possible
without feedback. If not, the gain in that particular
channel is automatically reduced. This will influence
soft sounds only.
The Automatic Feedback Manager may help users
to acclimatize to the new “hearing experience”. A
temporary reduction of the max gain in one or more
channels will set the hearing aid to a level that the
wearer is accustomed to. Later, the gain can be increased gradually to the prescribed values in order
to optimize audibility of soft sounds.
500 Hz / Low Band
1 kHz / Mid Band
Output dB HL
Output dB HL
UCL
UCL
120
100
120
HTL
100
HTL
When fitting multi-channel hearing aids, traditional
filters with fixed orders rarely give the right compensation over the entire frequency range. Moderately
sloping hearing losses are best fitted using low order
filters to avoid peaks or valleys in the compensation,
while precipitously sloping hearing losses need high
order filters to obtain appropriate compensation.
Programming
SENSO P38 can be programmed using the LP2 Portable Programmer or via a PC using the HI-PRO interface and NOAH/COMPASS software. Please refer to the SENSO P37/P38 programming manual.
80
80
60
60
40
40
20
40
60
80
100 Input dB HL
20
40
60
80
100 Input dB HL
3 kHz / High Band
Output dB HL
When fitting the 3 channel SENSO P38, the
VarioSlope™ filters provide natural slopes for most
types of hearing loss in order to ensure optimal fitting between the frequency channels.
UCL
120
HTL
100
80
60
40
20
40
60
80
100 Input dB HL
Dynamic I/O curve
for a speech signal
Enhanced Dynamic Range Compression can also
be described through I/O-curves. The steady-state
I/O-curves (black lines) show how amplification is
adjusted as a function of the input level. For low inputs, amplification is reduced to minimize microphone noise and feedback. For medium level inputs,
it is reduced gradually so that soft sounds are amplified more than loud sounds.
The level dependent amplification allows soft
sounds to become audible, without risking discomfort from high sound levels. Profound hearing losses
will not suffer from excessive amplification of loud
sounds.
The grey curves show dynamic I/O curves for normal speech. It is reproduced almost linearly, but the
average amplification is determined according to the
non-linear steady-state I/O curve.
HTL and UCL values are inserted as dotted lines.
Sound reproduced below HTL cannot be heard.
Note how speech is constantly being reproduced
above HTL, without exceeding the UCL.
SENSO P38
Sound Stabilizer™
In automatic hearing aids, the gain adjustment has
to work fast in order to adapt quickly to changes in
the environment. The fast gain adjustment of such
systems will often cause “pumping” effects which
can be very annoying for the user, especially in
noisy surroundings, and may result in reduced
speech comprehension.
Automatic Feedback Manager
VarioSlope™ filters
Traditional filters
VarioSlope™ filters
Amplified Speech
Enhanced Dynamic Range
Compression
Output dB HL
100
Enhanced Dynamic Range Compression works to
present all signals to the SENSO P38 user at a natural sensation level.
HTL
80
60
40
In these two audiograms, HTLs and UCLs of a profound hearing loss are shown. For each of three different speech signals, both unamplified and amplified speech spectra are shown.
20
20
The Sound Stabilizer™ applies different regulation
speeds to different signals. This forces the SENSO
P38 to keep a steady gain in stable sound environments, optimizing speech intelligibility, but ensuring
the needed fast adaptation to changes in the acoustic environment. After shouting or other loud sounds,
P38 will quickly turn up amplification to allow listening to normal speech.
Unamplified Speech
40
60
80
100 Input dB HL
SENSO P38 has a built-in Automatic Feedback
Manager which minimizes feedback.
Soft Speech (53 dB SPL)
It is worth noting that:
Normal Speech (62 dB SPL)
The Enhanced Dynamic Range Compression system requires high gain for low level inputs. Depending on the earmould quality, the high gain will
increase the risk of feedback in quiet surroundings.
1.Amplified speech is made audible in all cases, as it is
reproduced between the users’ HTL and UCL.
Loud Speech (75 dB SPL)
2. Amplification is different for different levels of
speech. Comparison of amplified and unamplified speech reveals 55 dB amplification in the low
frequencies for soft speech and 40 dB for loud
speech.
In each of the three channels, the Automatic Feedback Manager verifies if the high gain is possible
without feedback. If not, the gain in that particular
channel is automatically reduced. This will influence
soft sounds only.
The Automatic Feedback Manager may help users
to acclimatize to the new “hearing experience”. A
temporary reduction of the max gain in one or more
channels will set the hearing aid to a level that the
wearer is accustomed to. Later, the gain can be increased gradually to the prescribed values in order
to optimize audibility of soft sounds.
500 Hz / Low Band
1 kHz / Mid Band
Output dB HL
Output dB HL
UCL
UCL
120
100
120
HTL
100
HTL
When fitting multi-channel hearing aids, traditional
filters with fixed orders rarely give the right compensation over the entire frequency range. Moderately
sloping hearing losses are best fitted using low order
filters to avoid peaks or valleys in the compensation,
while precipitously sloping hearing losses need high
order filters to obtain appropriate compensation.
Programming
SENSO P38 can be programmed using the LP2 Portable Programmer or via a PC using the HI-PRO interface and NOAH/COMPASS software. Please refer to the SENSO P37/P38 programming manual.
80
80
60
60
40
40
20
40
60
80
100 Input dB HL
20
40
60
80
100 Input dB HL
3 kHz / High Band
Output dB HL
When fitting the 3 channel SENSO P38, the
VarioSlope™ filters provide natural slopes for most
types of hearing loss in order to ensure optimal fitting between the frequency channels.
UCL
120
HTL
100
80
60
40
20
40
60
80
100 Input dB HL
Dynamic I/O curve
for a speech signal
Enhanced Dynamic Range Compression can also
be described through I/O-curves. The steady-state
I/O-curves (black lines) show how amplification is
adjusted as a function of the input level. For low inputs, amplification is reduced to minimize microphone noise and feedback. For medium level inputs,
it is reduced gradually so that soft sounds are amplified more than loud sounds.
The level dependent amplification allows soft
sounds to become audible, without risking discomfort from high sound levels. Profound hearing losses
will not suffer from excessive amplification of loud
sounds.
The grey curves show dynamic I/O curves for normal speech. It is reproduced almost linearly, but the
average amplification is determined according to the
non-linear steady-state I/O curve.
HTL and UCL values are inserted as dotted lines.
Sound reproduced below HTL cannot be heard.
Note how speech is constantly being reproduced
above HTL, without exceeding the UCL.
SENSO P38
SENSO P38
100% digital, High Power BTE
• Programmable (LP2 or COMPASS)
• 3 channel DSP
with VarioSlope™ filters
• Sound Stabilizer™
• Enhanced Dynamic Range
Compression
• Automatic Feedback Manager
• Optional Digital Comfort VC
Technical Data
OSPL90:
711
Ear simulator
2cc
Coupler
Peak
144 dB SPL
138 dB SPL
1000 Hz
143 dB SPL
138 dB SPL
HAIC
139 dB SPL
134 dB SPL
Battery Drain (st. by)
Battery Drain (typical)
The SENSO P38 features, together with the elegant design,
make it a natural extension of hearing rather than just an aid.
The SENSO Digital Signal Processor (DSP) works with 20-bit
representation of the signal and a sampling rate of 32 kHz.
SENSO P38 is a superbly engineered hearing aid in the renowned Widex tradition.
Battery Life (675ZA, 600 mAh)*
Relative Telecoil Sensitivity**
• 3 channel DSP with VarioSlope™ filters for accurate and
versatile fitting.
• Enhanced Dynamic Range Compression to maximize
speech intelligibility and listening comfort.
• Sound Stabilizer™ for fast adjustment to sudden
changes in the sound environment while maintaining
speech intelligibility and speech dynamic range.
Recommended for:
• Moderately severe to profound hearing
losses.
• All configurations of hearing loss including conductive, fluctuating, sloping, flat
and reverse slope losses.
• Persons wanting the digital solution to
their hearing loss.
Suggested Fitting Range
• Automatic Feedback Manager (patent pending) for
reduction of acoustic feedback.
• Optional Digital Comfort Volume Control (± 6 dB range)
with beep-tone adjustment indicator.
140
130
120
1.2 mA
110
500 hours
+ 3 dB
1%
IRIL (900/1800 MHz)
0/15 dB SPL
Typical data that mimic Ref. Test Gain conditions (HTL values of 85, 100
and 100 with an input of 65 dB SPL).
Under more severe conditions (HTL values of 115, 120 and 120, and an
input of 80 dB SPL) where High Power batteries are necessary, battery
life can drop to 100 hours.
** A telecoil input of 100 mA/m will equal a microphone input of 70 dB SPL.
SENSO P38 offers you:
Output dB SPL
1.0 mA
Harmonic Distortion
*
Maximum Output (ear simulator - IEC711)
A
B
100
90
100
200
500 1000
Frequency
A : AOC disabled
2000
5000
Hz
B : AOC enabled
Maximum Output (2cc coupler - IEC126)
Output dB SPL
140
130
A
B
120
110
100
90
100
200
500 1000
Frequency
A : AOC disabled
2000
5000
Hz
B : AOC enabled
AOC (Automatic Output Control) is an output limiting compression
circuit that eliminates distortion from saturation. It can be turned on
(=factory setting) and off from the programming devices.
• M, MT, and T settings available. The “T” and “MT” responses are compensated to preserve the frequency
and output level of the acoustic signal.
• The microphone and telecoil inputs each have their own
Sigma-Delta converter allowing a telecoil with a digital
anti-hum filter to reduce interference from the mains.
• Long battery life of approximately 500 hours.
• Low battery beep-tone indicator.
• Minimal audible internal noise due to special processing.
• Digital Power Drive™ (DPD). SENSO’s Direct Digital
Drive (patent pending) developed for high power instruments.
• Direct audio input.
(P!P38!3101!10154)
Printed by Widex / 7-98
P P38 3101 101