This top page is to transmit the proof that I am still alive and enjoying retired life, mainly to my relatives, friends and former students. A story or an event is selected from daily life and my thoughts and experience are introduced.
From Daily Life - 84: Hearing aid renewal I bought my first hearing aid 8 years ago when I was 86 years old. I have already introduced in this column the story leading up to the purchase. When I wore the hearing aid, I could hear well, but the background noise was often too loud and unbearable. So, I decided to wear the aid only when I needed help.
When I became 90 years old, I started to suffer from serious listening
difficulty in recognizing spoken words. I reported in this column the diagnosis on my hearing impairment given by a nearby university-attached hospital. The doctor's advice was
that the only way to prevent further deterioration was to wear the hearing
aid at all times and continue to make effort to listen. Since then, I have
always worn the hearing aid except during sleeping in bed, and have been
struggling to listen words.
The lifespan of hearing aid seems to be 4 to 5 years. My regular hearing
aid shop told me that it is a luck to have an aid working for 8 years without
any problems. I felt that it was a proper time to replace. I was recommended
to try out the latest model, so I used it for about two weeks. I had been
using a domestic Rionet hearing aid of earplug type (upper left), but the
trial model was a Swiss-brand Phonak of ear-hook type (upper right). Before
trying it out, I compared the results of my hearing test with those of
new and old hearing aids. As far as the ability to distinguish single syllables,
I found no tangible difference, so I had little expectation at the time.
However, when I actually used it for trial, I could realize that my ability
to recognize words had improved to some extent. This may be mainly due
to the enhanced function for background noise suppression.
In the earplug type, a microphone, speaker, electronic circuitry, and
battery are packed into a small earplug. In the ear-hook type, all components
are installed in the external ear-hook, and the earplug only transmits
sound. The ear-hook type, which has no size restrictions, also has a high
degree of freedom in adding functions. One of these is the incorporation
of Bluetooth, which connects wirelessly to external devices. If we connect
aid to a smartphone, we can adjust the volume of the aid and make hands-free
calls. If we connect aid to a TV, we can hear the sound directly. The battery
is also larger, and its lifespan has increased to more than a week. The
custom-made plugs of both ears are made by taking a mold, and are connected
to the ear hooks by thin vinyl tubes.
After trying the new model, I decided to buy it. The price is 660 k\,
a significant increase from 350 k\ I paid for the old one, but I decided
to accept it as a necessary expenditure to maintain my quality of life
for the years to come. The dream hearing aid that significantly improves
word recognition does not yet seem to exist in the world. The only way
to slow the further deterioration of listening ability is to continue listening.
I will continue to struggle with this new hearing aid.
→ Past Top Pages
"From Daily Life"
1: Tracing family roots
2: The second last car
3: August 15. my memorial day
4: Battlefield rations
5: Begginer at the gym
6: Fuji View Hotel
7: Lesson in Hiragana writing by brush
8: Moving from old to new smartphone
9: Living alone in my second year
10: Welcomed by cherry blossom
11: Eden of peach blossom
12: Tama River Walk
13: Chichibu Pilgrimage
14: Bonds with local community
15: About my homepage
16: Annual report of athletic gym
17: Pilgrimage to Mt. Tsukuba
18: Reunion of alumni and classmates
19: Braking by left foot
20: Battlefield rations in the sequel
21: Granddaughter has come!
22: Visit to Kobayashi Residence
23: Wake-up exercise
24: Digital photo album
25: Seven tools for brushing teeth
26: Ambulance
27: Quick report on drive monitoring
28: Hearing aid
29: Jindai Botanical Park
30: 2020, a historic year
31: Topics of eye
32: Final report on drive monitoring
33: Cognitive ability test
34: PCI to prevent heart infarction
35: Ashikaga Flower Park
36: 90 years old supported by medication
37: 3 years with Subaru
38: 45 years living in Seijo
39: Caspian Sea yogurt
40: Home Museum of Aunt Zschäbitz
41: Reunion of university classmates
42: Okutama spar tour
43: New Year's greeting card
44: Implant
45: Fuchu Forest Park
46: Grave closing
47: Walking group of local community
48: How-to books for the elderly
49: Home altar
50: Such a life
51: Knee of the elderly
52: Metropolitan Kinuta Park
53: Shirakaba Art Museum of Kiyoharu
54: Haiku; Metasequoia
55: Three years with COVID-19
56: Battlefield rations in the 6th year
57: Hearing impairment
58: Shinjuku Station
59: Haiku with photograph
60: Moving to 5G smartphone
61: History of private cars
62: Setagaya Art Museum
63: FreeCell
64: Turbo
65: Hinata Temple of Yakushi
66: Moving of home computer
67: Amakusa tour
68: Hand craft as a hobby
69: Kitami Community Square
70: Photo-Haiku 2
71: Support scam abusing Trojan Horse
72: Bedside gym
73: Metropolitan Nogawa Park
74: Family funeral
75: Sudoku (Number Place)
76: Photo-Haiku 3
77: Ohyama Afri Shrine
78: Kunisaki Peninsula tour
79: The old school system is far away
80: Cooking group of local community
81: Motor fan group of local community
82: Directories disappear!
83: Tunnel ventilation
"Memorable Scenes"
Series 1: Parade with Doctor hat on the head
Series 2: Calligraphy in a frame
Series 3: A young man from the Orient
Series 4: Sumo-stamping
Series 5: Waiting room of Shanghai Station
Series 6: Let's Walk Festival
Series 7: Last long-distance drive
Series 8: My Car No. 3
Series 9: Ski camp
Series 10: Safari experience
Series 11: First encounter with dogwood
Series 12: Mt. Fuji
"Treasure Box of Words"
Series 1: Virtue brings profit
Series 2: Wait for a ripe moment
Series 3: Catch the symptoms
Series 4: Words are selected metaphors
Series 5: Start with two humans
Series 6: Optimism is a will, pessimism a mood
Series 7: Atop a summit, and another becomes visible
Series 8: We see only what we want to see
Series 9: Chanllenge is the privilage of the young
Series 10: Today is the first day of my life
Engineer Series 1: Who's engineer, juveniles' answer
Series 2: Corus of "We raise engineers!"
Series 3: From Nobel Prize to Gold Medal
Series 4: Professionals in three categories
Series 5: Various tasks in engineering
Series 6: Classification of EPs by IEA
Series 7: Science, technology and related professionals
Series 8: Proposal for the classification of engineers
Series 9: Revised proposal for the classification of engineers
Series 1 - 10: Whole Series including summary and remarks
Cartoon Series 1: Mechanism of viscosity
Series 2: Mechanism of loss generation
Series 3: Commuter packer and enthalpy
Series 4: Skinny grasshopper and fat pupa
Series 5: From hand-drawn picture to ready-made clip art
Series 6: Why do you learn? - 1
Series 7: Why do you learn? - 2
Series 8: Two Sciences
Series 9: Scientist and Engineer
Series 10: Science and Non-science
Series 11: Structure of human relations
Series 12: Oriental subconsciousness
Nostalgia Series 1: The first own car
Series 2: The first driver's license
Series 3: Comparison of German and Japanese Diploma
Series 4: The first air travel
Series 5: Tachometer used 60 years ago
Series 6: The three sacred calculators
Series 7: The first home computer
Series 8: Sentimental journey to Nordkapp
Series 9: Change of photograph
Series 10: Story of passport
The others
Membership of Academic/Professional Societies
Curriculum Vitae
Recent Publications
The center of gravity of recent publications has been shifting from those with the topics in fluids engineering to those in engineering education. Please refer to Publications List of the recent papers written in English.