Boosting energy near 2 kHz and 8 kHz makes a sound brighter and harsher

Evidence

For example, using an equalizer, a sound can be made thinner by decreasing the energy in the frequency range between about 100 Hz and 500 Hz (note that “this” is under the horizontal line in the “energy down” part of the diagram). The sound will become brighter, more sibilant, harsher and sweeter by increasing the energy around 2 kHz and 8 kHz. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1517

Categorization

• DEFINE: Gives concrete frequency-band manipulations underlying timbre descriptors like thin, bright, and harsh.
• XREF: connects to: Strong energy above the fifth harmonic makes instruments sound bright — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1475; Bright timbres stem from strong energy in harmonics above the seventh; Very early reflections can resonantly boost power across the whole audible range — Eric J. Heller, Why You Hear What You Hear- An…, 1093 (+17 more)

Broader Connections

• Bright timbres stem from strong energy in harmonics above the seventh #expands (1.00)
• Very early reflections can resonantly boost power across the whole audible range #contradicts (1.00) — Eric J. Heller, Why You Hear What You Hear- An…, 1093
• A singer’s formant boosts a distinct energy band near 2.4-3.5 kHz #exemplifies (1.00)
• Playing wind instruments louder shifts spectral energy toward higher harmonics. #complicates (0.85) — Eric J. Heller, Why You Hear What You Hear- An…, 2257
• Spreading a sound’s energy across more critical bands increases perceived loudness without raising intensity #complicates (0.80) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 665
• Hearing forms loudness by integrating sound energy over about 100-200 ms #complicates (0.75) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 1171
• A tenfold intensity increase is perceived as only twice as loud #complicates (0.75) — Eric J. Heller, Why You Hear What You Hear- An…, 143
• Doubling sound wave amplitude quadruples the power delivered #complicates (0.75)
• Raising sound pressure by 40 dB roughly triples perceived fluctuation strength #complicates (0.75)
• Piano strings and soundboards can exchange energy producing audible loudness shimmer #complicates (0.75)
• Uniform exciting noise loudness grows as intensity raised to the 0.23 power #complicates (0.75) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 1255
• Sounds with steep spectral peaks evoke stronger pitch than sounds with narrow spectral notches. #complicates (0.75)
• Widening a sound’s bandwidth makes it seem louder at equal total power #complicates (0.75) — Eric J. Heller, Why You Hear What You Hear- An…, 2008
• Raising low-pass noise level measurably raises its perceived pitch #complicates (0.75) — Professor Dr.-Ing. Hugo Fastl, Professor Dr.-Ing. Eberhard, Psychoacoustics- Facts and Models, 844
• Confining a vibrating source makes it radiate louder sound #complicates (0.75) — Eric J. Heller, Why You Hear What You Hear- An…, 538