# BSTJ 4: 4. October 1925: Speech Power and Energy. (Sacia, C.F.)

Bell System Technical Journal, 4: 4. October 1925 pp 627-641. Speech Power and Energy. (Sacia, C.F.)

- Kind: Magazine
- Series: BSTJ 4: 4. October 1925: Speech Power and Energy
- Year: 1925
- Archive: [Internet Archive](https://archive.org/details/bstj4-4-627)
- Licence or status: none stated by the archive
- Who can read it: Tweens profiles and older (placed by Invisible Network from what the archive says)

[Read it](https://invisiblenetwork.ai/print/ia/bstj4-4-627/read)