Hideo Ohashi, Prof. Emeritus

University of Tokyo & Kogakuin University
The Window to Society after Retirement from Engineering Education


 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

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Let's find facts!  Final version revised in August, 2016.

Japanese universities found in statistics

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Brief Self Introduction
Mail address: PGA02322@nifty.com
Place of residence: Tokyo, Japan

Major Past Activities

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.