Topic 14. Audio Information and Media

Lesson 1: Definition of Audio Information and Media

Audio Information and Media refers to the use of sound—spoken words, music, sound effects—to convey messages, tell stories, or share information. It is commonly used in radio, podcasts, music, voiceovers, and announcements.

Examples of Audio Media:

·  Radio broadcasts

·  Podcasts

·  Audiobooks

·  Music

·  Sound effects

Lesson 2: Types of Audio Information

·  Radio Broadcast - live or recorded audio sent through radio waves to reach a wide audience

·  Music - vocal or instrumental sounds combined in such a way as to produce beauty of form, harmony, and expression of emotion

·  Sound Recording - recording of an interview, meeting, or any sound from the environment

·  Sound Clips / Effects - any sound artificially reproduced to create an effect in a dramatic presentation (ex. sound of a storm, or a door)

·  Audio Podcast - a digital audio or video file or recording, usually part of a themed series, that can be downloaded from a website to a media player or a computer

Lesson 3: Ways to Store Audio Information

·  Tape - magnetic tape on which sound can be recorded

·  CD (Compact Disc) - a plastic-fabricated, circular medium for recording, storing, and playing back audio, video, and

·  computer data

·  USB Drive - an external flash drive, small enough to carry on a key ring, that can be used with any computer that has a USB Port

·  Memory Card (aka Flash Memory Card or Storage Card) - is a small storage medium used to store data such as text, pictures, audio, and video, for use on small, portable, or remote computing devices.

·  Computer Hard Drive - secondary storage devices for storing audio file

·  Internet / Cloud - websites or file repositories for retrieving audio files, and more precisely the files are stored in some datacenter full of servers that is connected to the Internet

Lesson 4: Audio File Formats

·  MP3 (MPEG Audio Layer 3) - a common format for consumer audio, as well as a standard of digital audio compression for the transfer and playback of music on most digital audio players.

·  M4A / AAC (MPEG4 Audio /  Advanced Audio Coding) - an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rate

·  WAV - is a Microsoft audio file format standard for storing an audio bitstream on PCs. It has become a standard file format for game sounds, among others

·  WMA (Windows Media Audio) - is an audio data compression technology developed by Microsoft and used with Windows Media Player

Lesson 5: Units of Sound

• Decibel or simply dB - noise of sound measurement

• Hertz or simply Hz unit of sound frequency

• Phon unit of subjective loudness

Lesson 6: Characteristics and Purposes of Sound

·  Volume – intensity of a sound

·  Tone – the audible characteristic of a sound

·  Pitch -  is how high or low a sound is

·  Loudness - refers to the magnitude of the sound heard

Lesson 7: Purposes of a Sound:

·  Give instruction or information.

·  Provide feedback.

·  To personalize or customize

Lesson 8: Sources of Audio Information and Media

1.   Traditional Audio Sources:

·  Radio stations (AM/FM)

·  CDs, cassette tapes, vinyl records

2.   Digital Audio Sources:

·  Online streaming platforms (Spotify, Apple Podcasts)

·  Audiobooks (Audible, Google Play Books)

·  Social media (Facebook Live Audio, Twitter Spaces)

3.   Informal Audio Sources:

·  Voice messages, recorded lectures, online discussions

Lesson 9: Advantages and Limitations of Audio Media

Advantages:

• Easy to access and listen to anytime, anywhere.

• Enhances understanding when combined with text or visual media.

• Encourages multitasking—people can listen while doing other activities.

Limitations:

• Requires active listening skills to fully understand messages.

• No visual aid, making complex topics harder to grasp.

• Audio quality affects comprehension (e.g., poor recording, background noise).

Lesson 10: Hearing vs. Listening, Learning Out Loud

Difference Between Hearing and Listening

Hearing – Passive; simply perceiving sound (e.g., background music, conversations in the distance).

Listening – Active; paying attention to and processing audio information (e.g., focusing on a lecture, podcast).

Learning Out Loud

·  Learning out loud involves using audio resources to enhance learning:

·  Listening to audiobooks to improve comprehension.

·  Recording voice notes to summarize lessons.

·  Participating in discussions/podcasts to develop speaking and critical thinking skills.

Lesson 11: Selection Criteria for Evaluating Audio Information

To ensure that audio sources are reliable and valid, students should use the CRAAP Test:

·  Currency – Is the audio source up to date?

·  Relevance – Does it relate to the topic and purpose?

·  Authority – Who is the speaker/creator? Is it credible?

·  Accuracy – Are facts supported by reliable evidence?

·  Purpose – Is it meant to inform, persuade, or entertain?

Lesson 12: Design Principles and Elements for Audio-Based Presentations

When creating audio presentations (e.g., podcasts, radio dramas), students should apply the following principles:

·  Clarity and Quality – Ensure clear sound and proper volume.

·  Tone and Emotion – Match voice tone to message intent (e.g., serious, excited).

·  Sound Effects and Music – Enhance storytelling, but don’t overuse.

·  Pacing and Timing – Speak clearly and at the right speed.

·  Script and Organization – Plan content logically for smooth flow.