Locating two sound sources: The role of amplitude modulation and spectral content.

2011 ◽  
Vol 129 (4) ◽  
pp. 2488-2488
Author(s):  
Willim A. Yost ◽  
Christopher Brown ◽  
Farris Walling
Keyword(s):  
Amplitude Modulation ◽  
Sound Sources ◽  
Spectral Content

scholarly journals The Historical Soundscape Analysis of Fatahillah Square, Jakarta

Acoustics ◽  
2020 ◽  
Vol 2 (4) ◽  
pp. 847-867
Author(s):  
Michael Isnaeni Djimantoro ◽  
Widjaja Martokusumo ◽  
Heru W. Poerbo ◽  
R. Joko Sarwono
Keyword(s):  
Cultural Heritage ◽  
Visual Analysis ◽  
Sound Sources ◽  
The Past ◽  
Holistic Understanding ◽  
Sonic Environment ◽  
The 19Th Century ◽  
Comprehensive Study

Understanding conceptions of the protection of cultural heritage continues to develop until now. Presently, urban historic places are not only comprehended as tangible but also include intangible dimensions. However, the conservation of cultural heritage dominantly still emphasises the visual sense more than any other senses. Thus, this paper addressed several questions on the role of human senses, the historic sonic environments, and the soundmarks of the past in examining a historical area. This paper aims to reveal the relation between sound sources and its predicted sonic environment in historic places over the time. The case study was Fatahillah Square, Jakarta, which has been documented from the 19th century until now. Some methods were carried out such as soundwalk, recalled in memory, and visual analysis. The results show that comprehensive study of multisensorial stimulus can increase a holistic understanding of historic places. Therefore, the protection of historic sites cannot only focus on the object per se, but also it must be considered to be a holistic entity. This research highlights new perspectives in analysing historical areas using combination of pictorial sources and sonic information.

scholarly journals The Role of Reverberation and Magnitude Spectra of Direct Parts in Contralateral and Ipsilateral Ear Signals on Perceived Externalization

2019 ◽  
Vol 9 (3) ◽  
pp. 460 ◽  
Author(s):  
Song Li ◽  
Roman Schlieper ◽  
Jürgen Peissig
Keyword(s):  
Speech Signal ◽  
Impulse Responses ◽  
Sound Sources ◽  
Reverberant Environments ◽  
Contralateral Ear ◽  
Listening Experiment ◽  
Binaural Sound

Several studies show that the reverberation and spectral details in direct sounds are two essential cues for perceived externalization of virtual sound sources in reverberant environments. The present study investigated the role of these two cues in contralateral and ipsilateral ear signals on perceived externalization of headphone-reproduced binaural sound images at different azimuth angles. For this purpose, seven pairs of non-individual binaural room impulse responses (BRIRs) were measured at azimuth angles of −90°, −60°, −30°, 0°, 30°, 60°, and 90° in a listening room. The magnitude spectra of direct parts were smoothed, and the reverberation was removed, either in left or right ear BRIRs. Such modified BRIRs were convolved with a speech signal, and the resulting binaural sounds were presented over headphones. Subjects were asked to assess the degree of perceived externalization for the presented stimuli. The result of the subjective listening experiment revealed that the magnitude spectra of direct parts in ipsilateral ear signals and the reverberation in contralateral ear signals are important for perceived externalization of virtual lateral sound sources.

scholarly journals Resolving competing theories for control of the jamming avoidance response: the role of amplitude modulations in electric organ discharge decelerations

1999 ◽  
Vol 202 (10) ◽  
pp. 1377-1386 ◽  
Author(s):  
Y. Takizawa ◽  
G.J. Rose ◽  
M. Kawasaki
Keyword(s):  
Avoidance Response ◽  
Electric Fields ◽  
Phase Difference ◽  
Amplitude Modulation ◽  
Electric Organ Discharge ◽  
Modulation Depth ◽  
Electric Organ ◽  
Jamming Avoidance Response ◽  
Jamming Avoidance

The algorithm for the control of the jamming avoidance response (JAR) of Eigenmannia has been the subject of debate for over two decades. Two competing theories have been proposed to explain how fish determine the correct direction to shift their pacemaker frequency during jamming. One theory emphasizes the role of time-asymmetric beat envelopes, while the other emphasizes the role of amplitude- and phase-difference computations that arise from the differences in spatial geometry of the electric fields of neighboring fish. In repeating earlier experiments, we found that the decision to raise or lower the pacemaker frequency reliably above or below its resting level depends on the latter process, and that frequency deceleration responses to amplitude modulation appear to be sufficient to explain previous experimental results on which the former theory is based. Specifically, fish of the genus Eigenmannia show differential deceleration responses to asymmetric beat envelopes. The deceleration responses do not require phase modulation and show a sensitivity for amplitude modulation depth and selectivity for amplitude modulation rate comparable with that of JARs that are elicited when amplitude- and phase-difference information is available.

The object of perception in impacted sound sources: The role of perceptual accessibility and information accuracy

2007 ◽  
Vol 121 (5) ◽  
pp. 3166-3166 ◽  
Author(s):  
Bruno L. Giordano ◽  
Stephen McAdams ◽  
Davide Rocchesso
Keyword(s):  
Sound Sources

Jazz Drums

2019 ◽  
pp. 219-230
Author(s):  
Gregory Evans
Keyword(s):  
Music Educators ◽  
Drum Set ◽  
Sound Sources

It is no secret that music educators are faced with unique challenges when engaging young musicians who play drum sets. Many educators aren’t drummers themselves, which can create fear and uncertainty and ultimately lead them to avoid, rather than embrace, the wonderful and exciting world of jazz percussion. This chapter provides conceptual and technical approaches to understanding the role each component of the drum set contributes to the ensemble, as well as the role of the drum set in its entirety. It also touches on how dynamics can change the function and style of a groove as well as creative ways to encourage students to move beyond pattern playing. In particular, discussion and examples are provided regarding setup, sound sources, keeping time, functioning within the rhythm section, transitioning from timekeeping to improvising, and various rhythms and grooves.

Sign in / Sign up

Export Citation Format

Share Document