RCRD 3005 Audio Eng Final Review Questions with 100% Verified Correct Answers What is the Equal Loudness Principle? - Correct Answer The ear is much more sensitive to mid-range frequencies than low and high frequencies at low volumes. As volume increases, the curve of our hearing flattens out so we hear all frequencies equally (around 85db). However, our ears become more sensitive to highs and lows once volume increases past this point.What is amplitude? - Correct Answer The height/vertical distance of a sound wave. It determines the volume of the sound.What is frequency and what is it measured in? - Correct Answer The number of cycles a soundwave completes in one second, perceived as pitch. It is measured in Hertz (Hz).What is phase? - Correct Answer The travel of a soundwave.What is a fundamental frequency? - Correct Answer The lowest frequency of a given sound wave. It determines the pitch of that wave.What are overtones? - Correct Answer Higher frequencies above the fundamental that help create the timbre of a sound.What are harmonics? - Correct Answer Overtones that are multiples of the fundamental frequency.What is a Sound Envelope and what are the four stages? - Correct Answer A sound envelope is the changes in amplitude (the rise and fall of volume) in a note.
- Attack: the start or "trigger" of the sound. It is an increase in volume from silence to the loudest
- Decay: the decrease in volume from the peak of the attack to the average level of the note.
point of the sound. The speed of the attack will depend on the instrument and how it is played.
3. Sustain: the maintained volume of a note as it is played/held.
- Release: the decrease in volume from the average level to silence once the trigger is removed.
What is constructive interference? - Correct Answer When two sound waves travel in phase with each other, causing an increase in amplitude/volume.What is the threshold of hearing? - Correct Answer 0 dB SPL 1 / 2
What is the threshold of feeling? - Correct Answer 120 dB SPL What is the threshold of pain? - Correct Answer 130 dB SPL What is the AB Stereo micing technique? - Correct Answer 2 matched mics (same manufacturer,
model, and polar pattern) placed on a sound source using the 3:1 rule.
What is the XY Stereo micing technique? - Correct Answer Two cardioid mics placed together with their capsules touching, angled at 90 degrees. Because the capsules are touching, sound will reach them at the same time, thus eliminating phase issues.What is the ORTF micing technique? - Correct Answer Two cardioid mics angled at 110 degrees, overlapping mid-body. Creates a wider stereo image than XY.What is the NOS micing technique? - Correct Answer Two cardioid mics angles at 90 degrees overlapping at the base/connector. Creates a very wide stereo image.What is the MS-Stereo micing technique? - Correct Answer Mid-Side Technique. A cardioid mic is placed above a bidirectional mic, with their diaphragms angled at 90 degrees. The output of the bidirectional mic is split into two channels and one of the outputs is phase reversed. The output of the cardioid mic is placed in a third channel.What is the Blumlein Stereo technique? - Correct Answer Two bidirectional mics stacked on top of each other, angled at 90 degrees. Picks up the Left and Right of the sound source, as well as the Left and Right of the ambience of the recording space.What is the Decca Tree technique? - Correct Answer Three matched omnidirectional mics placed in an equilateral triangle to cover a very large area. Commonly used for orchestral recordings.What is the Binaural Stereo technique? - Correct Answer Small omnidirectional mics placed in the ears of a dummy head to replicate the stereo image of what the human ears typically perceive in real life. Creates a spherical sound image when listened back to in headphones.How many track busses does the SSL Duality have? - Correct Answer 24
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