Letter (Astounding, April 1946): Bats Can Be Heard to Squeak—But the 60,000 Cycle Squeaks—the Really Important Part of Their Squeaking—Is Inaudible. Same with Television. Some of It Can Be Heard, But Only the Small Fraction Between 50 and 15,000 Cycles. The Part from 15,000 to 5,000,000 Cycles Is Lost.
| First published | April 1946 |
|---|---|
| Type | Essay |
Publications (1)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| April 1946 | Astounding Science Fiction, April 1946 | Street & Smith Publications, Inc. | MAGAZINE | 98 |