Digital Sound Reviewer PDF

01 HANDOUT 1 If the speakers are mounted on the ceiling, The Current State of Multimedia Ambisonics - This is an immersive sound. It g...

01 HANDOUT 1 If the speakers are mounted on the ceiling, The Current State of Multimedia Ambisonics - This is an immersive sound. It gives you 360 degrees Connectivity - People can sounds. It goes well with VRs and easily connect and get what they ARs. need anywhere and everywhere. For Smart Sound - These are sounds example, we can already conduct that are in portable devices. classes or conferences online via Zoom. HUMANISTIC VALUES FOR MULTIMEDIA Interactive – We are already living Empathy - It understands the in an internet-connected world, so needs or the feelings of others. As almost everything is digital. We Multimedia professionals, whenever interact with the computer; we we create material, we should interact with apps and other consider and solve people's needs. digital materials. Inclusion - This means that your Artificial Intelligence - Artificial multimedia material should be Intelligence (AI) will impact every accessible and usable to industry and every human being everyone, including those people in the future. One example of an with disabilities. existing AI technology is face Sustainability - Sustainability detection and recognition; means that when you create a Augmented Reality – AR enhances Multimedia material, it can last in the version of our physical world, the next five (5) years or more. which enhances our engagement because you add computer AUDIO EDUCATION graphic images on the user’s view Audio Health and interact with it. According to Harvard Health, Virtual Reality – VRs are created to “exposure to sound levels above 85 enhance user experience to educate dB (equal to a lawnmower or leaf and entertain users. It makes the blower) can cause possible ear users feel like they are immersed damage with exposure of more than or present in a particular place or two hours, while exposure to the environment using a VR headset sound of 105 to 110 dB can cause or helmet. damage in five minutes. Sound less than 70 dB is unlikely to cause Today’s Sounds any significant damage to the Surround Sound - These are ears.” sounds that are in the movie theaters or home theaters. How can we take care of our Atmos - Atmos is a kind of hearing health? surround-sound technology wherein ○ Avoid too much loud noise If the speakers are mounted on the you are using earbuds or ceiling. headphones,  ○ the volume should not be For the Visually Challenged - One more than 60% and no example is a Text-to-Speech that more than 60 minutes a can help a visually impaired day. person translate the words in a ○ If you are using headphones, particular document to audio so remove them from time to he/she will be able to understand time to allow your ears to it. rest. If you were exposed to loud noises for a long period, 02 HANDOUT 2 step outside or distance yourself for 5 to 10 minutes What is Sound? to allow your ears to rest. Sound is a vibration or a series of ○ Clean your ears with extra vibrations that move through the care. Don’t use sharp or air. Anything that creates the pointed objects to clean your vibrations, or waves, is referred to as ears because it might injure the source. your ear canal or eardrum. It’s the sensation produced by ○ Exercise is good for your stimulations of the organs of hearing ears. According to Ear Q, by vibrations transmitted through “Cardio exercises like the air or other mediums walking, running, or cycling gets the blood pumping to all What is Sound Design? parts of your body, including It creates audio for different kinds the ears. This helps the ears’ of media like film, music, game internal parts stay healthy design, portable gadgets, TV, and working to their advertising, etc. maximum potential.” How does Sound work? SOUND APPLICATION Sound vibrations travel in a wave Education - Our education today is pattern, and we call these becoming more interactive, digital, vibrations sound waves. Sound and dynamic. Audio helps to waves moved by vibrating objects, enhance learners like us to and these objects vibrate other enhance our learning experience. surrounding objects carrying the It also allows us to learn a lesson sound along (“Physics for Kids,” easily. n.d.) For example, nowadays, we can Sound is produced when an listen to audiobooks. We can already object vibrates, creating a learn from Spotify through listening pressure wave. This pressure wave to podcasts. causes particles in Cultural Preservation - As the surrounding Multimedia professionals, we can medium (air, water, create something to help preserve or solid)to have our culture. vibrational motion. Critical Parts of Audio An audio signal uses two different Frequency channels: one for the left and one Also known as the sound’s “pitch,” for the right (L+R). We mostly use this is also the speed of the sound stereo nowadays because it sounds vibration. It’s measured in Hertz more realistic and it sounds wider. (Hz). 5.1 An average human hearing range is The 5.1 is a surround-sound audio from 20 to 20,000 Hz. system. This so far delivers the best Amplitude audio. It is the level of sound pressure or It uses five (5) audio channels intensity of sound measured in and a subwoofer channel. This is decibels (dB). commonly used in home theaters. Sounds more than 85dB is 7.1.4 dangerous for your hearing This is a surround-sound channel health, especially if you have long wherein some speakers are placed exposure. in the ceiling to generate sounds 70 dB and below are safe for above the listener. humans. Sample Rates Waveform determine the range of frequencies It is the “shape” of the sound and that’s been captured in digital audio. the most recognizable part of a It is measured per second using sound. kilohertz (kHz). According to Tech Terms, it is an Bit Depth image representing an audio It is the sound data that is captured signal or recording that shows the and stored in an audio file. In other changes in amplitude over a words, it’s the resolution of the certain amount audio. of time. The higher the audio bit depth, the more detailed the sound. Audio File Compression When we say audio file compression, reducing the file size from its original makes it easier to stream and download files. How to Compress an Audio File? Mono Usually, this is being done on a An audio signal that only has a computer with the help of a DAW single channel. It only sends one or Digital Audio Workstation like signal to the left and right Audacity, Studio One, or Adobe channels. Audition. Stereo Lossy Vs. Lossless.flac LOSSY Free Lossless Audio Codec ○ Reduces the audio file size, (FLAC) is an open-source but it will remove some lossless digital audio format. audio information and FLAC files can be used to simplify the data, compress an audio file to half of compromising the audio its original file size. quality. Audio streaming ○ Examples: Mp3 & AAC.aac LOSSLESS Advanced Audio Coding, also ○ Reduces the audio file size known as MPEG-4 AAC, is without losing its data. This commonly used by iTunes, Apple means that they can be Music, YouTube, and Android. reconstructed without Streaming over mobile devices. ○ losing their quality. ○ Examples: FLAC, WAV, 03 HANDOUT 3 AIFF MICROPHONE BASICS Audio File Formats How Does a Microphone Work.mp3 A microphone is a transducer that This is the most common and converts sound waves to an popular lossy digital audio/music electrical signal. format. Creating high-quality sound files..wav WaveForm Audio (WAV) is the default audio file type for windows. This file type is very compatible with most digital players, but the file size can be too large and might take longer to stream or download. If you want the highest audio quality, If you are recording original audio or Podcast recording. Types of Microphones.aiff Dynamic Audio Interchange File Format Dynamic microphones are mostly (AIFF) was developed exclusively used in a loud environment. for Apple. Condenser It gives you studio-grade audio Condenser microphones are often recording and playback. used for detailed recording and Audio recording are usually used in the recording studio. Shotgun Microphone Also known as boom mics are long, narrow tubes. It's pointed directly to the target source of sounds. It's commonly used in film/video production. Lavalier Also known as lapel mic. It is a small microphone attached to the person's body or clothing to pick up the sound clearly. This is commonly used for recording dialogues, especially in Interviews, vlogging, Mic Patterns Also known as a polar pattern. It's a 3-dimensional space around the microphone that is sensitive to sound waves. It also shows you the directional characteristics, like where the mic rejects the sound or where it is least sensitive. Omnidirectional It can capture sounds evenly from all directions. This is good if you want to capture the room sounds. Cardioid It captures the sound in front then blocks everything else. Super-Cardioid microphones pick up the sound mainly in the front, and the back of the mic is less sensitive to sound and can still pick up some noise. Bidirectional It can pick up the sounds from the front and back but has poor pick-up from the sides.