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Music Practice
2025-11-04
I. Sound Insulation Core: Creating an "Acoustic Fortress-Level" Door and Window System 1. Window Frame Material: Triple Noise Reduction Structure, Thermally Broken Aluminum + Multi-Cavity Design: Selecting thermally broken aluminum alloy with a wall thickness ≥1.8mm, the frame material features an internal structure with three or more cavities (such as a main cavity + sound insulation cotton...
Original article: How to solve the problem of noise from upstairs?
2025-11-04
My approach was to first record a video of the noise from her apartment, then go upstairs to her and say, "Excuse me, neighbor, I live downstairs from you. I've been hearing this noise every night lately (showing her the video). I don't know if it's from your apartment. The soundproofing in our building might not be very good. Could you please be a little quieter? We're all neighbors living in...
How to control transformer noise in power systems?
2025-11-04
Noise control measures: 1. Reduce magnetic field-induced vibration: To reduce noise generated by magnetic field-induced vibration, low-noise design can be adopted during the design phase, such as using low magnetic resistance materials and rationally designing the core structure; in addition, increasing insulation materials and reducing coil current density can also effectively reduce...
[Acoustics Trivia] These sound secrets are unknown to 90% of people!
2025-11-04
The sound reflection time is as long as 1-2 seconds (only 0.3 seconds in a normal room), automatically adding a "million-dollar sound engineer" effect. Scientists: This may be the ultimate weapon for cats to tame humans! What you actually hear is-so the other person's voice actually arrived before the signal, but was "cached" by the phone! (Sound appears when the screen unlocks...)
2025-11-04
Noise pollution significantly erodes the quality of life for nearby residents, causing not only health problems such as anxiety and insomnia, but also creating a multi-dimensional chain of harm encompassing physiological, psychological, and social aspects. Furthermore, the closed-loop "monitoring-analysis-governance" process established during the remediation process provides a replicable...
2025-11-04
Singapore has very strict penalties for making noise in public places. Anyone who sings loudly, plays a musical instrument, or otherwise makes noise in public that annoys others will be fined or imprisoned for disorderly conduct. This is a prerequisite for ensuring adequate sound insulation at home...
Acoustics Basics | Explanations of Those "Obscure" Acoustic Terms
2025-11-04
A sound field refers to the area covered by sound propagation in space, and is the result of the interaction between sound waves and a medium. Standing wave phenomena are particularly important in acoustic design because they can cause abnormal increases or decreases in sound intensity in certain areas, affecting the overall acoustic effect. A sound bridge refers to a structure where panels...
[Weekly Science Popularization] The Technical Architecture of Reverberation Time Control
2025-11-04
Reverberation time refers to the time required for the sound pressure level in a diffuse sound field within a room to decrease by 60 dB after the sound source stops emitting sound. Sound absorption and noise reduction are tools for controlling reverberation time. The difference in sound pressure level before and after treatment is: ΔLp = 10lg (T<sub>after</sub> / T<sub>before</sub>). The ratio...
Why must sweet words be whispered in the left ear?
2025-11-04
Test whether you are left-brain dominant or right-brain dominant. These 10 people all have stronger hearing in their left ear than their right. An electroencephalogram (EEG) tells us that the right brain has a larger amplitude than the left brain because the impulses of sound perceived by the left and right ears are transmitted through the auditory nerve to the auditory centers of the left and...
How does South Korea deal with noise from upstairs neighbors?
2025-11-04
Noise pollution between floors in public housing has long been a social problem in South Korea. According to statistics from the South Korean "Neighborhood Relations Center for Noise Pollution Between Floors," complaints from South Koreans regarding noise pollution between floors have been steadily increasing in recent years. There were over 7,000 cases in 2012, and this number doubled to...
2025-11-04
A recent study published in the *Journal of the Association for Otolaryngology Research* by Oregon Health & Science University (OHSU) reveals for the first time that children's central auditory system is still developing before puberty, and their binaural pitch fusion ability may be a key factor in...
2025-11-04
• Written communication records: Screenshots of WeChat/SMS dissuasion, or a "Noise Rectification Notice" issued by the property management (signed by the other party) → Bring the evidence to the property management to fill out a "Noise Complaint Registration Form" and request a mediation result within 7 days → Bring the following materials: ID, noise evidence, mediation record, 1234...
How to distinguish low-frequency noise? (Original content)
2025-11-04
Low-frequency noise refers to sounds with frequencies below 500 Hz (octave band). Within the range of the human ear, 20 Hz to 500 Hz is considered low frequency; that is, irregular sounds produced by vibrations of 20 to 500 times per second are called low-frequency noise. For example, in the image below: the sound of a lawnmower is 100 decibels, but its frequency...
Soundproofing Tips: How to do soundproofing during home renovation?
2025-11-04
- Zoned soundproofing: When operating noisy appliances (such as vacuum cleaners and washing machines), consider placing them in a more enclosed space, such as a dedicated laundry room, to prevent sound transmission. - Soundproof ceiling: Install soundproof ceiling panels and fill them with sound-absorbing materials. This can reduce the noise level from upper floors...
Elevator Noise Reduction Technology: A Paradigm Revolution from Passive Governance to Active Defense
2025-11-04
(3mm butyl rubber + 2mm aluminum plate) Noise attenuation of 12dB from 100-800Hz. Utilizing a three-dimensional elastic support (X/Y/Z axis stiffness ratio 3:2:1), 63Hz vibration is attenuated by 15dB. The hoistway forms a Helmholtz resonant cavity (typical frequency 80-125Hz), amplifying the car's vibration...
2025-11-04
Whether the singer's voice truly violates the two laws mentioned above requires a standard of judgment, as we cannot completely ignore the fact that Indians have exceptionally sharp hearing. If he finds it too noisy, but the noise level is within the legal limits, he can only take appropriate soundproofing measures himself. What if this Indian friend encountered an uncommunicative,...
2025-11-04
The definition and control of environmental noise pollution are not determined by a single entity, but are the result of joint participation from national standards, laws and regulations, local governments, enterprises, and the public. A key challenge in environmental noise pollution control is the lax enforcement of standards: insufficient enforcement in some areas has led to the long-term...
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