# Harvey Fletcher

> Harvey Fletcher was an American physicist. Known as the "father of stereophonic sound", he is credited with the invention of the 2-A audiometer and an early electronic hearing aid. He was an investigator into the nature of speech and hearing, and made contributions in acoustics, electrical engineering, speech, medicine, music, atomic physics, sound pictures, and education. Following his death, he was credited with collaborating with his doctoral advisor, Robert Millikan, on the Nobel-prize winning oil drop experiment which first determined the charge of the electron.

*American physicist (1884-1981)*

**Canonical URL:** https://fame.am/person/harvey-fletcher

## Identity
- **Profile type:** Scientist ([Wikidata](https://www.wikidata.org/entity/Q39631))
- **Category:** Scientists
- **Country:** United States
- **Born:** 1884-09-11
- **Died:** 1981-07-23
- **Status:** deceased
- **Gender:** male

## Bio

Imported from discovery source: wikidata-dump

## Fame
- **Popularity score:** 47.1 / 100
- **Momentum:** 0.0 / 100  (trend: FALLING)
- **Historical depth:** 14.4 / 100
- **Now attention:** 0.0 / 100
- **Source confidence:** 60.0 / 100
- **Profile completeness:** 70.0 / 100

## Sources
- [哈維·福萊柴爾](https://zh.wikipedia.org/wiki/%E5%93%88%E7%B6%AD%C2%B7%E7%A6%8F%E8%90%8A%E6%9F%B4%E7%88%BE)
- [هارفي فليتشر](https://ar.wikipedia.org/wiki/%D9%87%D8%A7%D8%B1%D9%81%D9%8A_%D9%81%D9%84%D9%8A%D8%AA%D8%B4%D8%B1)
- [هارفى فليتشر](https://arz.wikipedia.org/wiki/%D9%87%D8%A7%D8%B1%D9%81%D9%89_%D9%81%D9%84%D9%8A%D8%AA%D8%B4%D8%B1)
- [هاروی فلچر](https://azb.wikipedia.org/wiki/%D9%87%D8%A7%D8%B1%D9%88%DB%8C_%D9%81%D9%84%DA%86%D8%B1)
- [Harvey Fletcher](https://ca.wikipedia.org/wiki/Harvey_Fletcher)
- [Harvey Fletcher](https://de.wikipedia.org/wiki/Harvey_Fletcher)
- [Harvey Fletcher](https://en.wikipedia.org/wiki/Harvey_Fletcher)
- [هاروی فلچر](https://fa.wikipedia.org/wiki/%D9%87%D8%A7%D8%B1%D9%88%DB%8C_%D9%81%D9%84%DA%86%D8%B1)
- [Harvey Fletcher](https://fi.wikipedia.org/wiki/Harvey_Fletcher)
- [Harvey Fletcher](https://fr.wikipedia.org/wiki/Harvey_Fletcher)
- [ハーヴェイ・フレッチャー](https://ja.wikipedia.org/wiki/%E3%83%8F%E3%83%BC%E3%83%B4%E3%82%A7%E3%82%A4%E3%83%BB%E3%83%95%E3%83%AC%E3%83%83%E3%83%81%E3%83%A3%E3%83%BC)
- [Harvey Fletcher](https://mg.wikipedia.org/wiki/Harvey_Fletcher)
- [Harvey Fletcher](https://nl.wikipedia.org/wiki/Harvey_Fletcher)
- [Harvey Fletcher](https://pl.wikipedia.org/wiki/Harvey_Fletcher)
- [Harvey Fletcher](https://pt.wikipedia.org/wiki/Harvey_Fletcher)
- [Harvey Fletcher](https://tr.wikipedia.org/wiki/Harvey_Fletcher)
- [Гарві Флетчер](https://uk.wikipedia.org/wiki/%D0%93%D0%B0%D1%80%D0%B2%D1%96_%D0%A4%D0%BB%D0%B5%D1%82%D1%87%D0%B5%D1%80)
- [Wikidata](https://www.wikidata.org/wiki/Q2568271)

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