JPH0633753Y2 - ハウリング防止機能付携帯用拡声器 - Google Patents
ハウリング防止機能付携帯用拡声器Info
- Publication number
- JPH0633753Y2 JPH0633753Y2 JP4222089U JP4222089U JPH0633753Y2 JP H0633753 Y2 JPH0633753 Y2 JP H0633753Y2 JP 4222089 U JP4222089 U JP 4222089U JP 4222089 U JP4222089 U JP 4222089U JP H0633753 Y2 JPH0633753 Y2 JP H0633753Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- loudspeaker
- amplifier
- microphone
- preamplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002265 prevention Effects 0.000 title claims description 10
- 230000005236 sound signal Effects 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000003321 amplification Effects 0.000 description 14
- 238000003199 nucleic acid amplification method Methods 0.000 description 14
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4222089U JPH0633753Y2 (ja) | 1989-04-10 | 1989-04-10 | ハウリング防止機能付携帯用拡声器 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4222089U JPH0633753Y2 (ja) | 1989-04-10 | 1989-04-10 | ハウリング防止機能付携帯用拡声器 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02133094U JPH02133094U (enExample) | 1990-11-05 |
| JPH0633753Y2 true JPH0633753Y2 (ja) | 1994-08-31 |
Family
ID=31553571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4222089U Expired - Lifetime JPH0633753Y2 (ja) | 1989-04-10 | 1989-04-10 | ハウリング防止機能付携帯用拡声器 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0633753Y2 (enExample) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019148021A (ja) * | 2018-02-26 | 2019-09-05 | 新日本無線株式会社 | 衣服の信号処理システム、及び衣服 |
-
1989
- 1989-04-10 JP JP4222089U patent/JPH0633753Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02133094U (enExample) | 1990-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5987147A (en) | Sound collector | |
| US5647011A (en) | Headphone sound system | |
| EP1244278B1 (en) | Portable telephone attachment for person hard of hearing | |
| US20150020815A1 (en) | Protective Mask with Imbedded Functionality | |
| US20220054870A1 (en) | Face Mask Communication System | |
| CA2433476A1 (en) | Telephone with integrated hearing aid | |
| US20220030340A1 (en) | Voice Amplification System for Disposable PPE Masks | |
| US11006231B1 (en) | Voice amplification apparatus for personal protective equipment | |
| JPH0633753Y2 (ja) | ハウリング防止機能付携帯用拡声器 | |
| TWM539251U (zh) | 具有通訊功能之智慧頭盔 | |
| CN108024166B (zh) | 具有语音通信功能的耳饰 | |
| CN212488727U (zh) | 一种外部安装式头盔音频装置 | |
| US6940984B2 (en) | Hands-free megaphone | |
| JP3010428U (ja) | 拡声装置付きヘルメット | |
| KR102636025B1 (ko) | 무선 마스크 | |
| CN206547169U (zh) | 具有语音通信功能的耳饰 | |
| JP2602620Y2 (ja) | スピーカ内蔵機器 | |
| JP3084518U (ja) | 音声聞き取り器 | |
| JPH0744303Y2 (ja) | 電気かみそり | |
| CN220359362U (zh) | 一种便于携带的助听器 | |
| JPS6211120Y2 (enExample) | ||
| CN214799798U (zh) | 一种用于英语教学的便携式教师扩音装置 | |
| JPWO2022051580A5 (enExample) | ||
| JP3115946U (ja) | 多機能強光スピーカー | |
| JPH10294996A (ja) | スイッチレス補聴器 |