Effect of spectral overlap on the echo suppression threshold for single reflection conditions

Walther, Andreas; Robinson, Philip W.; Santala, Olli

doi:10.1121/1.4812447

Cited by 5 publications

(4 citation statements)

References 12 publications

(16 reference statements)

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“…However, for reflections differing in magnitude spectrum and phase spectrum, the suppression was found to be generally weaker compared to a specular reflection, e.g. [8][9][10].…”

Section: Echo Suppression For Non-specular Reflectionsmentioning

confidence: 99%

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Precedence effect for specular and diffuse reflections

Wendt

Höldrich

2020

Acta Acust.

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Studies on the precedence effect are typically conducted by presenting two identical sounds simulating direct sound and specular reflection. However, when a sound is reflected from irregular surface, it is redirect into many directions resulting in directional and temporal diffusion. This contribution introduces a simulation of Lambertian diffusing reflections. The perceptual influences of diffusion are studied in a listening experiment; echo thresholds and masked thresholds of specular and diffuse reflections are measured. Results show that diffusion makes the reflections more easily detectable than specular reflections of the same total energy. Indications are found that this mainly due to temporal diffusion, while the directional diffusion has little effect. Accordingly, the modeling of the echo thresholds is achieved by a temporal alignment of the experimental data based on the energy centroid of reflection responses. For the modeling of masked threshold the temporal masking pattern for forward masking is taken into account.

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“…However, for reflections differing in magnitude spectrum and phase spectrum, the suppression was found to be generally weaker compared to a specular reflection, e.g. [8][9][10].…”

Section: Echo Suppression For Non-specular Reflectionsmentioning

confidence: 99%

“…Figure 9. Fitting parameters for specular and diffuse masked levels of conditions A (10,20,30) are calculated using Equation (7 . This yields a coefficient of determination R 2 = 0.99 with mean masked thresholds.…”

Section: Masked Thresholdmentioning

confidence: 99%

Precedence effect for specular and diffuse reflections

Wendt

Höldrich

2020

Acta Acust.

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“…This depends on many factors, including the delay of the reflection, its direction, the signal type, its spectrum and its sound level, or the environment. Their influence has been addressed in several studies [30][31][32][33][34][35][36][37]. A practical "rule of thumb" has been proposed [35], such that early reflections will be inaudible if their levels are less than −22 dB relative to the direct sound for a 3 ms delay, lowered to −31 dB for 15 ms to 30 ms, and that a modest amount of reverberation added in the stimuli increases the thresholds by up to 11 dB.…”

Section: Introductionmentioning

confidence: 99%

Sound Scattering by Gothic Piers and Columns of the Cathédrale Notre-Dame de Paris

Weber

Katz

2022

Acoustics

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Although the acoustics of Gothic cathedrals are of interest to researchers, the acoustic impact of their many columns is often neglected. The construction of the Cathédrale Notre-Dame de Paris spanned several centuries, including a wide variety of architectonic elements. This study investigates the sound scattering of a selection of seven designs that are relevant to this building as well as to the architectural style itself. These were measured on scale models (1:8.5 to 1:12), using a subtraction method, for receivers at about 3 m at full scale and a far-field source. They were also numerically simulated using a finite-difference time-domain method in two-dimensional space with an incident plane wave. The method integrates a finite volume framework to employ an unstructured mesh conforming to the complex geometries of interest. The two methods are in strong agreement for the considered configurations. Relative levels to the direct sound of backscattered reflections between −10 dB and 2 dB and between −15 dB and −6 dB in the transverse directions were estimated for the dimensions considered, relative to reported reflection audibility thresholds. Cross-sections with smaller scale geometrical elements on their perimeter can produce diffuse reflections similar to those of surface diffusers.

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“…Davies et al (1996) obtained a threshold of audibility for the seat-dip attenuation to be Ϫ5.7 dB in the 200 Hz octave band of the early energy over 0 to 40 ms. Although the seat-dip effect is generally considered to hamper the perception of bass, recent psychoacoustic research suggests that if the early reflections retain the bass, the lack of bass in the direct sound may actually enhance the overall perception of bass (Walther, Robinson, & Santala, 2013).…”

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confidence: 99%

Studies on the perception of bass in four concert halls.

Tahvanainen

Pätynen

Lokki

2015

Psychomusicology: Music, Mind, and Brain

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It is known that the perception of a warm and full sound in a concert hall requires a rich bass. However, earlier research offers an incomplete understanding on the perception of bass in concert halls, especially regarding how the excess attenuation of low frequencies due to seats affects the perception of musical instruments with low-frequency fundamentals. This article studies the level of perceived bass and its clarity in 4 concert halls via paired comparison listening tests. The results suggest that the perceived level of bass is strongly related to the seat-dip effect, in particular to its main attenuation frequency with both short musical excerpts and individual notes. Moreover, the perceived clarity of bass seems to depend on the musical content and instruments. The results also indicate a complicated relationship between level and clarity of bass, as clarity can be enhanced with an increased level of bass in some cases.

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Effect of spectral overlap on the echo suppression threshold for single reflection conditions

Cited by 5 publications

References 12 publications

Precedence effect for specular and diffuse reflections

Precedence effect for specular and diffuse reflections

Sound Scattering by Gothic Piers and Columns of the Cathédrale Notre-Dame de Paris

Studies on the perception of bass in four concert halls.

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