Related Experiment Video
Updated: Aug 28, 2025
11:11
Construction and Characterization of a Novel Vocal Fold Bioreactor
Published on: August 1, 2014
9.2K
Active Indoor Soundscape Design: A Case Study of Ceramic Passive Amplifiers
Feng Li1, Jiali Xiang1, Tao Li1
1School of Art and Design, Zhejiang Sci-Tech University, Hangzhou 310018, China.
International Journal of Environmental Research and Public Health
|September 23, 2022
Summary
Ceramic passive amplifiers enhance indoor soundscapes by optimizing loudness and positively influencing emotional perception through their shape and materials. This research offers practical solutions for improved acoustic comfort.
Area of Science:
- Acoustics
- Environmental Psychology
Background:
- Indoor soundscape research aims to enhance acoustic comfort beyond noise reduction.
- Current solutions for positive soundscape generation are limited.
Purpose of the Study:
- To evaluate ceramic passive amplifiers' impact on indoor soundscapes.
- To investigate the correlation between amplifier design (shape) and soundscape improvement.
Main Methods:
- Comparative analysis of 10 ceramic passive amplifiers against a baseline studio environment and an electronic amplifier.
- Measurement of objective sound pressure level (SPL) and subjective perception.
Main Results:
- Ceramic passive amplifiers effectively improve indoor soundscape quality by achieving suitable loudness.
- Amplifier shape and material positively influence non-acoustic aspects, including emotional guidance.
Conclusions:
- Ceramic passive amplifiers offer a viable method for enhancing indoor soundscapes.
- Design elements of passive amplifiers are crucial for both acoustic and emotional outcomes.
Related Concept Videos
01:25Active Filters
911
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
911
01:17Design Example: Vintage Mixing Console
282
A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
282
01:27Passive Filters
594
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
594
01:23Design Example
362
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
362
01:16Cascaded Op Amps
704
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
704
01:19Vibrating Concrete
168
Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
168