Decibel (Loudness) Comparison Chart
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  1. #1
    Letnan Satu
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    Decibel (Loudness) Comparison Chart

    Decibel (Loudness) Comparison Chart

    Here are some interesting numbers, collected from a variety of sources, that help one to understand the volume levels of various sources and how they can affect our hearing.

    Environmental Noise
    Weakest sound heard 0dB
    Normal conversation (3-5') 60-70dB
    Telephone dial tone 80dB
    City Traffic (inside car) 85dB
    Train whistle at 500' 90dB
    Subway train at 200' 95dB

    Level at which sustained exposure may result in hearing loss

    90 - 95dB
    Power mower 107dB
    Power saw 110dB
    Pain begins 125dB
    Pneumatic riveter at 4' 125dB
    Jet engine at 100' 140dB
    Death of hearing tissue 180dB
    Loudest sound possible 194dB


    OSHA Daily Permissible Noise Level Exposure
    Hours per day Sound level
    8 90dB
    6 92dB
    4 95dB
    3 97dB
    2 100dB
    1.5 102dB
    1 105dB
    .5 110dB
    .25 or less 115dB


    Perceptions of Increases in Decibel Level
    Imperceptible Change 1dB
    Barely Perceptible Change 3dB
    Clearly Noticeable Change 5dB
    About Twice as Loud 10dB
    About Four Times as Loud 20dB


    Sound Levels of Music
    Normal piano practice 60 -70dB
    Fortissimo Singer, 3' 70dB
    Chamber music, small auditorium 75 - 85dB
    Piano Fortissimo 84 - 103dB
    Violin 82 - 92dB
    Cello 85 -111dB
    Oboe 95-112dB
    Flute 92 -103dB
    Piccolo 90 -106dB
    Clarinet 85 - 114dB
    French horn 90 - 106dB
    Trombone 85 - 114dB
    Tympani & bass drum 106dB
    Walkman on 5/10 94dB
    Symphonic music peak 120 - 137dB
    Amplifier rock, 4-6' 120dB
    Rock music peak 150dB

    NOTES:

    * One-third of the total power of a 75-piece orchestra comes from the bass drum.
    * High frequency sounds of 2-4,000 Hz are the most damaging. The uppermost octave of the piccolo is 2,048-4,096 Hz.
    * Aging causes gradual hearing loss, mostly in the high frequencies.
    * Speech reception is not seriously impaired until there is about 30 dB loss; by that time severe damage may have occurred.
    * Hypertension and various psychological difficulties can be related to noise exposure.
    * The incidence of hearing loss in classical musicians has been estimated at 4-43%, in rock musicians 13-30%.

    Statistics for the Decibel (Loudness) Comparison Chart were taken from a study by Marshall Chasin , M.Sc., Aud(C), FAAA, Centre for Human Performance & Health, Ontario, Canada. There were some conflicting readings and, in many cases, authors did not specify at what distance the readings were taken or what the musician was actually playing. In general, when there were several readings, the higher one was chosen.

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  3. #2
    Sersan Dua
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    Re: Decibel (Loudness) Comparison Chart

    Quote Originally Posted by andersen
    Perceptions of Increases in Decibel Level
    Imperceptible Change 1dB
    Barely Perceptible Change 3dB
    Clearly Noticeable Change 5dB
    About Twice as Loud 10dB
    About Four Times as Loud 20dB
    Cuma mau nambahin (tapi rasanya sudah pada tahu ya) kalau secara teori setiap kenaikan sebesar 3dB butuh power 2 kali lipat. Kalau misalnya ada suara sebesar 90dB butuh tenaga 10 watt, biar level-nya jadi 93dB harus diberi tenaga 20 watt. Kalau dinaikkan lagi jadi 96dB, harus diberi 40 watt, dan kalau mau mencapai 99dB harus dikasih 80 watt.

    Menarik...bahwa untuk bikin suara yg kita anggap dua kali lebih keras dari patokan awal ternyata butuh daya yg besar sekali. Sementara sistem kelistrikan mobil terbatas, hanya 12 volts dan antara 60-90 amperes (tergantung alternator dan mobil). Kapan ya, mobil itu tegangannya 42 volts? Enak tuh, jadi gak butuh current besar. Otomatis current draw dari komponen listrik di mobil nggak bakal kayak sekarang, otomatis untuk audio reserve tenaga banyak. Bayangin head unit mobil punya built-in power 4x100 watts RMS...bisa2 amplifier eksternal nggak laku...

  4. #3
    Letnan Satu
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    bodapa: Bos.. coba elo liat di forum subwoofer mengenai MTX Jackhammer (video).. 1pc of 22" subwoofer powered about 5000W RMS. needs 3 optima yellow top batteries, 6 capacitors

 

 
GT Radial MBtech

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