Survey of AET Test 1 (2023/2024) Already Graded A

Survey of AET Test 1 (2023/2024) Already Graded A A sound wave is made up of a series of: all of the above The speed of sound at sea level, 70 degrees F is: 1130 FEET per second Hertz is a measurement of: frequency What is the relationship between two tones in which one is an octave above the other? different by a factor of 2 The unit we use for measuring amplitude dB- decibels The external structure of the ears is called the: pinna How we perceive frequency is called: pitch _______ begins as a vibration, travels through an elastic medium and loses energy over time sound The threshold of hearing 0 dB Timbre is determined largely by overtones A single, pure tone that contains no harmonics or overtones is known as a: sine wave PTS, or permanent threshold shift, is identified by a ringing, whistling or buzzing sound in the ears even though no loud sounds are present. This is called: Tinnitus How we perceive amplitude is called: loudness The "texture", "color", or "quality" of a sound is called its timbre The graphic representation of a sound waves compression and rarefaction patterns shown as amplitude and time is called a/an: waveform When sound waves mostly coincide in their compression and rarefaction cycles, they are said to be: constructive The organ where sound becomes electrical impulses in the human head is called cochlea The lowest frequency found in a complex tone, like a note played on piano is called the: fundamental one octave above 125 Hz is 250 Hz The sensitivity of our hearing in relation to frequency is illustrated in the equal-loudness principle Generally, the most sensitive band (frequencies) of human hearing is between: 2,000 Hz and 5,000 Hz Human perception of sound and our subjective responses to sound waves is called psychoacoustics We determine the direction of a sound through a process called spatial (binaural) localization Sound can pass through or around physical barriers. This is called diffraction attack + decay + sustain + release (ADSR) = envelope The time relationship between two sound waves is called phase The science of sound that describes how sound behaves in a space is called acoustics The hiding of one sound by another is called masking Humans can most accurately locate sources of sound in front of them Our ears can tolerate up to 140 dB SPL, which is considered threshold of pain The bandwidth of human hearing ranges from: 20 Hz to 20,000 Hz Tiny hair-like projections called ___________, transform mechanical vibrations into electrical and chemical signals, which are sent to the brain. cillia Lower frequencies have: longer wavelengths The threshold of feeling in the ear is: 120dB Two identical sound waves that are exactly "180 degrees out-of-phase" will cancel The frequency of A above middle C is: 440 Hz Why is the frequency of A above middle C important? orchestral tuning standard The sum of the early reflections and late reflections of a sound inside a room or space is known as: reverb The ossicle bones amplify or limit sound pressure and protect the ear from intense pressure The ear is considered a transducer because: It converts acoustical energy into electrical energy for the brain to interpret The mechanisms used to locate sounds spatially are: arrival time, intensity, pinna reflection