Digitalsignalprocessingin32bands TheADRO rules …...TECHNICAL DATA (According to IEC standard Pub....
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Mild BTE HB-G2A -10 0 10 20 30 40 50 60 70 80 90 100 110 120 125 250 500 1000 2000 4000 8000 Hearing level (dB) Frequency (Hz) -10 -10 0 10 10 20 20 30 30 40 40 50 50 60 60 70 70 80 80 90 90 100 100 110 110 120 120 125 250 500 1000 2000 4000 8000 Hearing level (dB) Hearing level (dB) Frequency (Hz) HI-G5A/HB-G2A HI-G5A/HB-G2A Moderate Severe Severe Digital signal processing in 32 bands The ADRO ® rules The ADRO (Adaptive Dynamic Range Optimization) rules are used to make low sounds louder enough to listen to and loud sounds comfortable level. Slow shift in gain Slow shift in gain can provide more natural hearing. Mild CIC HI-G5A Moderate
Transcript of Digitalsignalprocessingin32bands TheADRO rules …...TECHNICAL DATA (According to IEC standard Pub....
Mild
BTEHB-G2A
-100
102030405060708090
100110120
125 250 500 1000 2000 4000 8000
Hea
ringleve
l(dB
)
Frequency (Hz)
-10-1000
101020203030404050506060707080809090
100100110110120120
125 250 500 1000 2000 4000 8000
Hea
ringleve
l(dB
)Hea
ringleve
l(dB
)
Frequency (Hz)
HI-G5A/HB-G2AHI-G5A/HB-G2A
ModerateSevereSevere
Digital signal processing in 32 bands
The ADRO® rulesThe ADRO (Adaptive Dynamic Range Optimization)rules are used to make low sounds louder enough tolisten to and loud sounds comfortable level.
Slow shift in gainSlow shift in gain can provide more naturalhearing.
Mild
CICHI-G5A
Moderate
SpecificationsTECHNICAL DATA (According to ANSI standard S3.22 2003) (Typical value)
Model HI-G5A HB-G2A (with E1 hook)
Maximum-OSPL90 109 dB (3900 Hz) 126 dB (1150 Hz)
HFA-OSPL90 106 dB 122 dB
HFA-full-on Acoustic Gain 37 dB 49 dB
Reference Test Gain 29 dB 45 dB
Frequency Range 200 Hz to 5000 Hz
Equivalent Input Noise Level 27 dB 26 dB
Total Harmonic Distortion 500 Hz: 2% 800 Hz: 2% 1600 Hz: 2% 500 Hz: 4% 800 Hz: 2% 1600 Hz: 2%
Operating Switch Case Switch O-M2-M
Output Limiting Control MOL
Gain Control GAIN (range: 67 dB)Main VR (range: 10 dB)
GAIN (range: 77 dB)
Battery Type/Supply Voltage 10/1.3 V 13/1.3 V
Battery Current 0.74 mA 0.88 mA
Battery Life Approx. 100 hours Approx. 300 hours
Dimensions/Weight -3.80 × 1.34 × 0.88 cm /3.6 g (excluding battery)
Model HI-G5A HB-G2A
OSPL90 curve130
0dB=20µPa 1600 2500
120
110
100
90
80100 200 500 1000 2000 5000 10000
Frequency (Hz)
Out
putS
PL
(dB
)
Input SPL 90dB140
0dB=20µPa 1600 2500
130
120
110
100
90100 200 500 1000 2000 5000 10000
Frequency (Hz)
Outpu
tSPL(dB)
Input SPL 90dB
Full-on gain curve60
1600 2500
50
40
30
20
10100 200 500 1000 2000 5000 10000
Input SPL 50dB(0dB=20µPa)
Frequency (Hz)
Aco
ustic
Gai
n(d
B)
701600 2500
60
50
40
30
20100 200 500 1000 2000 5000 10000
Input SPL 50dB(0dB=20µPa)
Frequency (Hz)
Aco
ustic
Gain(dB)
Frequency response curve 110
0dB=20µPa 1600 2500
100
90
80
70
60100 200 500 1000 2000 5000 10000
Frequency (Hz)
Out
putS
PL
(dB
)
Input SPL 60dB120
0dB=20µPa 1600 2500
110
100
90
80
70100 200 500 1000 2000 5000 10000
Frequency (Hz)
Outpu
tSPL(dB)
Input SPL 60dB
TECHNICAL DATA (According to IEC standard Pub. 60118-0-1983 Amendment 1-1994) (Typical value)
Model HI-G5A HB-G2A (with E1 hook)
Reference Test Frequency 1600 Hz
OSPL90 104 dB 127 dB
500 Hz 112 dB 123 dB
Peak 122 dB 130 dB
Full-on Acoustic Gain 45 dB 58 dB
Equivalent Input Noise Level 25 dB 24 dB
Total Harmonic Distortion 500 Hz: 3% 800 Hz: 3% 1600 Hz: 2% 500 Hz: 4% 800 Hz: 2% 1600 Hz: 2%
Operating Switch Case Switch O-M2-M
Output Limiting Control MOL
Gain Control GAIN (range: 67 dB)Main VR (range: 10 dB)
GAIN (range: 77 dB)
Battery Type/Supply Voltage PR536/1.3 V PR48/1.3 V
Battery Current 0.74 mA 0.81 mA
Battery Life Approx. 100 hours Approx. 320 hours
Dimensions/Weight -3.80 × 1.34 × 0.88 cm /3.6 g (excluding battery)
Model HI-G5A HB-G2A
OSPL90 curve130
0dB=20µPa 1600 2500
120
110
100
90
80100 200 500 1000 2000 5000 10000
Frequency (Hz)
Out
putS
PL
(dB
)
Input SPL 90dB140
0dB=20µPa 1600 2500
130
120
110
100
90100 200 500 1000 2000 5000 10000
Frequency (Hz)
Outpu
tSPL(dB)
Input SPL 90dB
Full-on acoustic gain frequency response curve
601600 2500
50
40
30
20
10100 200 500 1000 2000 5000 10000
Input SPL 50dB(0dB=20µPa)
Frequency (Hz)
Aco
ustic
Gai
n(d
B)
701600 2500
60
50
40
30
20100 200 500 1000 2000 5000 10000
Input SPL 60dB(0dB=20µPa)
Frequency (Hz)
Aco
ustic
Gain(dB)
Basic frequency response curve 110
0dB=20µPa 1600 2500
100
90
80
70
60100 200 500 1000 2000 5000 10000
Frequency (Hz)
Out
putS
PL
(dB
)
Input SPL 60dB130
0dB=20µPa 1600 2500
120
110
100
90
80100 200 500 1000 2000 5000 10000
Frequency (Hz)
Outpu
tSPL(dB)
Input SPL 60dB
Specifications subject to change without notice.
The ADRO® rulesHarnessing the power of Digital Signal Processing (DSP), ADRO® is a flexible amplifier and provides benefits to users of hearing aids; headsets (including Bluetooth headsets); and mobile phones. ADRO® is dynamic and adapts automatically to different sound environments, providing superior audibility and loudness comfort, automatic optimization of speech intelligibility in noise, and high quality sound in any environment.
The gain will change according to the following rules.
1. The Comfort RuleReduces the gain in a frequency band if the 90th percentile estimate is higher than the Comfort Target. The Comfort Target in each frequency band is determined during the fitting process.
2. The Audibility RuleIncreases the gain in a frequency band if the 30th percentile estimate is below the Audibility Target.
3. The Maximum Output RulePrevents sudden high level sounds reaching uncomfortable levels by ensuring that individual frequency com-ponents cannot be larger than the Maximum Output Limits specified during the fitting process.
4. The Maximum Gain RuleLimits the loudness of very low-level sounds by not allowing the gain in any band to exceed the maximum value specified by during the fitting process.
Fig. 1 Input sound
Inpu
tsou
ndpres
sure
leve
l(dB
SPL)
Time (second)
Maximum output limit level (MOL)
Outpu
tsou
ndpres
sure
leve
l(dB
SPL)
Time (second)
90th percentile level of output sound
30th percentile level of output sound
Instantaneous output sound pressure level
Maximum gain rule Comfort rule Audibility rule Maximum gain rule
Comfort target level (CT)
Audibility target level (AT)
Fig. 2 Output sound
The output sound level is controlled so that it is to stay between the audibility target level and the comfort target level. This operation is equivalent to user’s volume adjustment; decrease the gain for louder sounds and increase it for lower sounds.
Fig. 1 shows the change in input sound pressure over time. The input sound is white noise and it continuously increases for the first 15 seconds and decreases for the next 15 seconds.
Fig. 2 shows the change in level of output sound of 1-kHz band.
Distributed by
Printed in Japan ‘06 11 1K. T
20-41, Higashimotomachi 3-chome, Kokubunji, Tokyo 185-8533, JapanTelephone: +81-42-359-7862 Fax: +81-42-359-7441
URL:http://www.rion.co.jp/english/
Recycled paper is used for this catalog.
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