What is AF (audio frequency or a.f.)? - Definition from WhatIs.com

Definition

AF (audio frequency or a.f.)

Part of the Electronics glossary:

See also RF (radio frequency).

AF (audio frequency) (also abbreviated af or a.f.) refers to alternating current ( AC ) having a frequency such that, if applied to a transducer such as a loudspeaker or headset, will produce acoustic waves within the range of human hearing. The AF range is generally considered to be from 20 Hz to 20,000 Hz.

All telephone circuits operate with AF signals in a restricted range of approximately 200 Hz to 3000 Hz. A telephone-line modem is an AF device that converts binary digital data into analog signals that can be transmitted over the telephone circuit, and also converts incoming AF signals into binary digital data.

This was last updated in January 2011
Posted by: Margaret Rouse

Related Terms

Definitions

  • signature analysis

    - Signature analysis has two meanings. It can involve scrutinizing human signatures in order to detect forgeries and it can be a troubleshooting technique in which an AC signal with a specific wavef... (WhatIs.com)

  • bioprinting

    - Although bioprinting is still in the experimental stage and is currently used primarily in scientific study rather than applied science, the possibility of creating functional replacement tissues o... (WhatIs.com)

  • flash storage

    - Flash storage, based on flash memory, is used for data repositories, storage systems and consumer devices, such as USB drives, smartphones and solid-state drives. Flash-based storage is faster than... (WhatIs.com)

Glossaries

  • Electronics

    - Terms related to electronics, including definitions about electrical components and words and phrases about computers, laptops parts, digital cameras, televisions and home appliances.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question About AF (audio frequency or a.f.)Powered by ITKnowledgeExchange.com

Get answers from your peers on your most technical challenges

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.